1600=2500(1-x)(1-x)(1-x)(1-x)(1-x)(1-x)(1-x)(1-x)(1-x)(1-x)(1-x)(1-x)(1-x)(1-x)

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Solution for 1600=2500(1-x)(1-x)(1-x)(1-x)(1-x)(1-x)(1-x)(1-x)(1-x)(1-x)(1-x)(1-x)(1-x)(1-x) equation: 


Simplifying
1600 = 2500(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Multiply (1 + -1x) * (1 + -1x)
1600 = 2500(1(1 + -1x) + -1x * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500((1 * 1 + -1x * 1) + -1x * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500((1 + -1x) + -1x * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + (1 * -1x + -1x * -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + (-1x + 1x2))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -1x + -1x = -2x
1600 = 2500(1 + -2x + 1x2)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Multiply (1 + -2x + 1x2) * (1 + -1x)
1600 = 2500(1(1 + -1x) + -2x * (1 + -1x) + 1x2 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500((1 * 1 + -1x * 1) + -2x * (1 + -1x) + 1x2 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500((1 + -1x) + -2x * (1 + -1x) + 1x2 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + (1 * -2x + -1x * -2x) + 1x2 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + (-2x + 2x2) + 1x2 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -2x + 2x2 + (1 * 1x2 + -1x * 1x2))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -2x + 2x2 + (1x2 + -1x3))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -1x + -2x = -3x
1600 = 2500(1 + -3x + 2x2 + 1x2 + -1x3)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 2x2 + 1x2 = 3x2
1600 = 2500(1 + -3x + 3x2 + -1x3)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Multiply (1 + -3x + 3x2 + -1x3) * (1 + -1x)
1600 = 2500(1(1 + -1x) + -3x * (1 + -1x) + 3x2 * (1 + -1x) + -1x3 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500((1 * 1 + -1x * 1) + -3x * (1 + -1x) + 3x2 * (1 + -1x) + -1x3 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500((1 + -1x) + -3x * (1 + -1x) + 3x2 * (1 + -1x) + -1x3 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + (1 * -3x + -1x * -3x) + 3x2 * (1 + -1x) + -1x3 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + (-3x + 3x2) + 3x2 * (1 + -1x) + -1x3 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -3x + 3x2 + (1 * 3x2 + -1x * 3x2) + -1x3 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -3x + 3x2 + (3x2 + -3x3) + -1x3 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -3x + 3x2 + 3x2 + -3x3 + (1 * -1x3 + -1x * -1x3))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -3x + 3x2 + 3x2 + -3x3 + (-1x3 + 1x4))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -1x + -3x = -4x
1600 = 2500(1 + -4x + 3x2 + 3x2 + -3x3 + -1x3 + 1x4)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 3x2 + 3x2 = 6x2
1600 = 2500(1 + -4x + 6x2 + -3x3 + -1x3 + 1x4)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -3x3 + -1x3 = -4x3
1600 = 2500(1 + -4x + 6x2 + -4x3 + 1x4)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Multiply (1 + -4x + 6x2 + -4x3 + 1x4) * (1 + -1x)
1600 = 2500(1(1 + -1x) + -4x * (1 + -1x) + 6x2 * (1 + -1x) + -4x3 * (1 + -1x) + 1x4 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500((1 * 1 + -1x * 1) + -4x * (1 + -1x) + 6x2 * (1 + -1x) + -4x3 * (1 + -1x) + 1x4 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500((1 + -1x) + -4x * (1 + -1x) + 6x2 * (1 + -1x) + -4x3 * (1 + -1x) + 1x4 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + (1 * -4x + -1x * -4x) + 6x2 * (1 + -1x) + -4x3 * (1 + -1x) + 1x4 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + (-4x + 4x2) + 6x2 * (1 + -1x) + -4x3 * (1 + -1x) + 1x4 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -4x + 4x2 + (1 * 6x2 + -1x * 6x2) + -4x3 * (1 + -1x) + 1x4 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -4x + 4x2 + (6x2 + -6x3) + -4x3 * (1 + -1x) + 1x4 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -4x + 4x2 + 6x2 + -6x3 + (1 * -4x3 + -1x * -4x3) + 1x4 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -4x + 4x2 + 6x2 + -6x3 + (-4x3 + 4x4) + 1x4 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -4x + 4x2 + 6x2 + -6x3 + -4x3 + 4x4 + (1 * 1x4 + -1x * 1x4))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -4x + 4x2 + 6x2 + -6x3 + -4x3 + 4x4 + (1x4 + -1x5))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -1x + -4x = -5x
1600 = 2500(1 + -5x + 4x2 + 6x2 + -6x3 + -4x3 + 4x4 + 1x4 + -1x5)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 4x2 + 6x2 = 10x2
1600 = 2500(1 + -5x + 10x2 + -6x3 + -4x3 + 4x4 + 1x4 + -1x5)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -6x3 + -4x3 = -10x3
1600 = 2500(1 + -5x + 10x2 + -10x3 + 4x4 + 1x4 + -1x5)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 4x4 + 1x4 = 5x4
1600 = 2500(1 + -5x + 10x2 + -10x3 + 5x4 + -1x5)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Multiply (1 + -5x + 10x2 + -10x3 + 5x4 + -1x5) * (1 + -1x)
1600 = 2500(1(1 + -1x) + -5x * (1 + -1x) + 10x2 * (1 + -1x) + -10x3 * (1 + -1x) + 5x4 * (1 + -1x) + -1x5 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500((1 * 1 + -1x * 1) + -5x * (1 + -1x) + 10x2 * (1 + -1x) + -10x3 * (1 + -1x) + 5x4 * (1 + -1x) + -1x5 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500((1 + -1x) + -5x * (1 + -1x) + 10x2 * (1 + -1x) + -10x3 * (1 + -1x) + 5x4 * (1 + -1x) + -1x5 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + (1 * -5x + -1x * -5x) + 10x2 * (1 + -1x) + -10x3 * (1 + -1x) + 5x4 * (1 + -1x) + -1x5 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + (-5x + 5x2) + 10x2 * (1 + -1x) + -10x3 * (1 + -1x) + 5x4 * (1 + -1x) + -1x5 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -5x + 5x2 + (1 * 10x2 + -1x * 10x2) + -10x3 * (1 + -1x) + 5x4 * (1 + -1x) + -1x5 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -5x + 5x2 + (10x2 + -10x3) + -10x3 * (1 + -1x) + 5x4 * (1 + -1x) + -1x5 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -5x + 5x2 + 10x2 + -10x3 + (1 * -10x3 + -1x * -10x3) + 5x4 * (1 + -1x) + -1x5 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -5x + 5x2 + 10x2 + -10x3 + (-10x3 + 10x4) + 5x4 * (1 + -1x) + -1x5 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -5x + 5x2 + 10x2 + -10x3 + -10x3 + 10x4 + (1 * 5x4 + -1x * 5x4) + -1x5 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -5x + 5x2 + 10x2 + -10x3 + -10x3 + 10x4 + (5x4 + -5x5) + -1x5 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -5x + 5x2 + 10x2 + -10x3 + -10x3 + 10x4 + 5x4 + -5x5 + (1 * -1x5 + -1x * -1x5))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -5x + 5x2 + 10x2 + -10x3 + -10x3 + 10x4 + 5x4 + -5x5 + (-1x5 + 1x6))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -1x + -5x = -6x
1600 = 2500(1 + -6x + 5x2 + 10x2 + -10x3 + -10x3 + 10x4 + 5x4 + -5x5 + -1x5 + 1x6)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 5x2 + 10x2 = 15x2
1600 = 2500(1 + -6x + 15x2 + -10x3 + -10x3 + 10x4 + 5x4 + -5x5 + -1x5 + 1x6)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -10x3 + -10x3 = -20x3
1600 = 2500(1 + -6x + 15x2 + -20x3 + 10x4 + 5x4 + -5x5 + -1x5 + 1x6)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 10x4 + 5x4 = 15x4
1600 = 2500(1 + -6x + 15x2 + -20x3 + 15x4 + -5x5 + -1x5 + 1x6)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -5x5 + -1x5 = -6x5
1600 = 2500(1 + -6x + 15x2 + -20x3 + 15x4 + -6x5 + 1x6)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Multiply (1 + -6x + 15x2 + -20x3 + 15x4 + -6x5 + 1x6) * (1 + -1x)
1600 = 2500(1(1 + -1x) + -6x * (1 + -1x) + 15x2 * (1 + -1x) + -20x3 * (1 + -1x) + 15x4 * (1 + -1x) + -6x5 * (1 + -1x) + 1x6 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500((1 * 1 + -1x * 1) + -6x * (1 + -1x) + 15x2 * (1 + -1x) + -20x3 * (1 + -1x) + 15x4 * (1 + -1x) + -6x5 * (1 + -1x) + 1x6 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500((1 + -1x) + -6x * (1 + -1x) + 15x2 * (1 + -1x) + -20x3 * (1 + -1x) + 15x4 * (1 + -1x) + -6x5 * (1 + -1x) + 1x6 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + (1 * -6x + -1x * -6x) + 15x2 * (1 + -1x) + -20x3 * (1 + -1x) + 15x4 * (1 + -1x) + -6x5 * (1 + -1x) + 1x6 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + (-6x + 6x2) + 15x2 * (1 + -1x) + -20x3 * (1 + -1x) + 15x4 * (1 + -1x) + -6x5 * (1 + -1x) + 1x6 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -6x + 6x2 + (1 * 15x2 + -1x * 15x2) + -20x3 * (1 + -1x) + 15x4 * (1 + -1x) + -6x5 * (1 + -1x) + 1x6 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -6x + 6x2 + (15x2 + -15x3) + -20x3 * (1 + -1x) + 15x4 * (1 + -1x) + -6x5 * (1 + -1x) + 1x6 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -6x + 6x2 + 15x2 + -15x3 + (1 * -20x3 + -1x * -20x3) + 15x4 * (1 + -1x) + -6x5 * (1 + -1x) + 1x6 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -6x + 6x2 + 15x2 + -15x3 + (-20x3 + 20x4) + 15x4 * (1 + -1x) + -6x5 * (1 + -1x) + 1x6 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -6x + 6x2 + 15x2 + -15x3 + -20x3 + 20x4 + (1 * 15x4 + -1x * 15x4) + -6x5 * (1 + -1x) + 1x6 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -6x + 6x2 + 15x2 + -15x3 + -20x3 + 20x4 + (15x4 + -15x5) + -6x5 * (1 + -1x) + 1x6 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -6x + 6x2 + 15x2 + -15x3 + -20x3 + 20x4 + 15x4 + -15x5 + (1 * -6x5 + -1x * -6x5) + 1x6 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -6x + 6x2 + 15x2 + -15x3 + -20x3 + 20x4 + 15x4 + -15x5 + (-6x5 + 6x6) + 1x6 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -6x + 6x2 + 15x2 + -15x3 + -20x3 + 20x4 + 15x4 + -15x5 + -6x5 + 6x6 + (1 * 1x6 + -1x * 1x6))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -6x + 6x2 + 15x2 + -15x3 + -20x3 + 20x4 + 15x4 + -15x5 + -6x5 + 6x6 + (1x6 + -1x7))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -1x + -6x = -7x
1600 = 2500(1 + -7x + 6x2 + 15x2 + -15x3 + -20x3 + 20x4 + 15x4 + -15x5 + -6x5 + 6x6 + 1x6 + -1x7)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 6x2 + 15x2 = 21x2
1600 = 2500(1 + -7x + 21x2 + -15x3 + -20x3 + 20x4 + 15x4 + -15x5 + -6x5 + 6x6 + 1x6 + -1x7)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -15x3 + -20x3 = -35x3
1600 = 2500(1 + -7x + 21x2 + -35x3 + 20x4 + 15x4 + -15x5 + -6x5 + 6x6 + 1x6 + -1x7)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 20x4 + 15x4 = 35x4
1600 = 2500(1 + -7x + 21x2 + -35x3 + 35x4 + -15x5 + -6x5 + 6x6 + 1x6 + -1x7)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -15x5 + -6x5 = -21x5
1600 = 2500(1 + -7x + 21x2 + -35x3 + 35x4 + -21x5 + 6x6 + 1x6 + -1x7)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 6x6 + 1x6 = 7x6
1600 = 2500(1 + -7x + 21x2 + -35x3 + 35x4 + -21x5 + 7x6 + -1x7)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Multiply (1 + -7x + 21x2 + -35x3 + 35x4 + -21x5 + 7x6 + -1x7) * (1 + -1x)
1600 = 2500(1(1 + -1x) + -7x * (1 + -1x) + 21x2 * (1 + -1x) + -35x3 * (1 + -1x) + 35x4 * (1 + -1x) + -21x5 * (1 + -1x) + 7x6 * (1 + -1x) + -1x7 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500((1 * 1 + -1x * 1) + -7x * (1 + -1x) + 21x2 * (1 + -1x) + -35x3 * (1 + -1x) + 35x4 * (1 + -1x) + -21x5 * (1 + -1x) + 7x6 * (1 + -1x) + -1x7 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500((1 + -1x) + -7x * (1 + -1x) + 21x2 * (1 + -1x) + -35x3 * (1 + -1x) + 35x4 * (1 + -1x) + -21x5 * (1 + -1x) + 7x6 * (1 + -1x) + -1x7 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + (1 * -7x + -1x * -7x) + 21x2 * (1 + -1x) + -35x3 * (1 + -1x) + 35x4 * (1 + -1x) + -21x5 * (1 + -1x) + 7x6 * (1 + -1x) + -1x7 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + (-7x + 7x2) + 21x2 * (1 + -1x) + -35x3 * (1 + -1x) + 35x4 * (1 + -1x) + -21x5 * (1 + -1x) + 7x6 * (1 + -1x) + -1x7 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -7x + 7x2 + (1 * 21x2 + -1x * 21x2) + -35x3 * (1 + -1x) + 35x4 * (1 + -1x) + -21x5 * (1 + -1x) + 7x6 * (1 + -1x) + -1x7 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -7x + 7x2 + (21x2 + -21x3) + -35x3 * (1 + -1x) + 35x4 * (1 + -1x) + -21x5 * (1 + -1x) + 7x6 * (1 + -1x) + -1x7 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -7x + 7x2 + 21x2 + -21x3 + (1 * -35x3 + -1x * -35x3) + 35x4 * (1 + -1x) + -21x5 * (1 + -1x) + 7x6 * (1 + -1x) + -1x7 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -7x + 7x2 + 21x2 + -21x3 + (-35x3 + 35x4) + 35x4 * (1 + -1x) + -21x5 * (1 + -1x) + 7x6 * (1 + -1x) + -1x7 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -7x + 7x2 + 21x2 + -21x3 + -35x3 + 35x4 + (1 * 35x4 + -1x * 35x4) + -21x5 * (1 + -1x) + 7x6 * (1 + -1x) + -1x7 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -7x + 7x2 + 21x2 + -21x3 + -35x3 + 35x4 + (35x4 + -35x5) + -21x5 * (1 + -1x) + 7x6 * (1 + -1x) + -1x7 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -7x + 7x2 + 21x2 + -21x3 + -35x3 + 35x4 + 35x4 + -35x5 + (1 * -21x5 + -1x * -21x5) + 7x6 * (1 + -1x) + -1x7 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -7x + 7x2 + 21x2 + -21x3 + -35x3 + 35x4 + 35x4 + -35x5 + (-21x5 + 21x6) + 7x6 * (1 + -1x) + -1x7 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -7x + 7x2 + 21x2 + -21x3 + -35x3 + 35x4 + 35x4 + -35x5 + -21x5 + 21x6 + (1 * 7x6 + -1x * 7x6) + -1x7 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -7x + 7x2 + 21x2 + -21x3 + -35x3 + 35x4 + 35x4 + -35x5 + -21x5 + 21x6 + (7x6 + -7x7) + -1x7 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -7x + 7x2 + 21x2 + -21x3 + -35x3 + 35x4 + 35x4 + -35x5 + -21x5 + 21x6 + 7x6 + -7x7 + (1 * -1x7 + -1x * -1x7))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -7x + 7x2 + 21x2 + -21x3 + -35x3 + 35x4 + 35x4 + -35x5 + -21x5 + 21x6 + 7x6 + -7x7 + (-1x7 + 1x8))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -1x + -7x = -8x
1600 = 2500(1 + -8x + 7x2 + 21x2 + -21x3 + -35x3 + 35x4 + 35x4 + -35x5 + -21x5 + 21x6 + 7x6 + -7x7 + -1x7 + 1x8)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 7x2 + 21x2 = 28x2
1600 = 2500(1 + -8x + 28x2 + -21x3 + -35x3 + 35x4 + 35x4 + -35x5 + -21x5 + 21x6 + 7x6 + -7x7 + -1x7 + 1x8)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -21x3 + -35x3 = -56x3
1600 = 2500(1 + -8x + 28x2 + -56x3 + 35x4 + 35x4 + -35x5 + -21x5 + 21x6 + 7x6 + -7x7 + -1x7 + 1x8)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 35x4 + 35x4 = 70x4
1600 = 2500(1 + -8x + 28x2 + -56x3 + 70x4 + -35x5 + -21x5 + 21x6 + 7x6 + -7x7 + -1x7 + 1x8)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -35x5 + -21x5 = -56x5
1600 = 2500(1 + -8x + 28x2 + -56x3 + 70x4 + -56x5 + 21x6 + 7x6 + -7x7 + -1x7 + 1x8)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 21x6 + 7x6 = 28x6
1600 = 2500(1 + -8x + 28x2 + -56x3 + 70x4 + -56x5 + 28x6 + -7x7 + -1x7 + 1x8)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -7x7 + -1x7 = -8x7
1600 = 2500(1 + -8x + 28x2 + -56x3 + 70x4 + -56x5 + 28x6 + -8x7 + 1x8)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Multiply (1 + -8x + 28x2 + -56x3 + 70x4 + -56x5 + 28x6 + -8x7 + 1x8) * (1 + -1x)
1600 = 2500(1(1 + -1x) + -8x * (1 + -1x) + 28x2 * (1 + -1x) + -56x3 * (1 + -1x) + 70x4 * (1 + -1x) + -56x5 * (1 + -1x) + 28x6 * (1 + -1x) + -8x7 * (1 + -1x) + 1x8 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500((1 * 1 + -1x * 1) + -8x * (1 + -1x) + 28x2 * (1 + -1x) + -56x3 * (1 + -1x) + 70x4 * (1 + -1x) + -56x5 * (1 + -1x) + 28x6 * (1 + -1x) + -8x7 * (1 + -1x) + 1x8 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500((1 + -1x) + -8x * (1 + -1x) + 28x2 * (1 + -1x) + -56x3 * (1 + -1x) + 70x4 * (1 + -1x) + -56x5 * (1 + -1x) + 28x6 * (1 + -1x) + -8x7 * (1 + -1x) + 1x8 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + (1 * -8x + -1x * -8x) + 28x2 * (1 + -1x) + -56x3 * (1 + -1x) + 70x4 * (1 + -1x) + -56x5 * (1 + -1x) + 28x6 * (1 + -1x) + -8x7 * (1 + -1x) + 1x8 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + (-8x + 8x2) + 28x2 * (1 + -1x) + -56x3 * (1 + -1x) + 70x4 * (1 + -1x) + -56x5 * (1 + -1x) + 28x6 * (1 + -1x) + -8x7 * (1 + -1x) + 1x8 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -8x + 8x2 + (1 * 28x2 + -1x * 28x2) + -56x3 * (1 + -1x) + 70x4 * (1 + -1x) + -56x5 * (1 + -1x) + 28x6 * (1 + -1x) + -8x7 * (1 + -1x) + 1x8 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -8x + 8x2 + (28x2 + -28x3) + -56x3 * (1 + -1x) + 70x4 * (1 + -1x) + -56x5 * (1 + -1x) + 28x6 * (1 + -1x) + -8x7 * (1 + -1x) + 1x8 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -8x + 8x2 + 28x2 + -28x3 + (1 * -56x3 + -1x * -56x3) + 70x4 * (1 + -1x) + -56x5 * (1 + -1x) + 28x6 * (1 + -1x) + -8x7 * (1 + -1x) + 1x8 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -8x + 8x2 + 28x2 + -28x3 + (-56x3 + 56x4) + 70x4 * (1 + -1x) + -56x5 * (1 + -1x) + 28x6 * (1 + -1x) + -8x7 * (1 + -1x) + 1x8 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -8x + 8x2 + 28x2 + -28x3 + -56x3 + 56x4 + (1 * 70x4 + -1x * 70x4) + -56x5 * (1 + -1x) + 28x6 * (1 + -1x) + -8x7 * (1 + -1x) + 1x8 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -8x + 8x2 + 28x2 + -28x3 + -56x3 + 56x4 + (70x4 + -70x5) + -56x5 * (1 + -1x) + 28x6 * (1 + -1x) + -8x7 * (1 + -1x) + 1x8 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -8x + 8x2 + 28x2 + -28x3 + -56x3 + 56x4 + 70x4 + -70x5 + (1 * -56x5 + -1x * -56x5) + 28x6 * (1 + -1x) + -8x7 * (1 + -1x) + 1x8 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -8x + 8x2 + 28x2 + -28x3 + -56x3 + 56x4 + 70x4 + -70x5 + (-56x5 + 56x6) + 28x6 * (1 + -1x) + -8x7 * (1 + -1x) + 1x8 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -8x + 8x2 + 28x2 + -28x3 + -56x3 + 56x4 + 70x4 + -70x5 + -56x5 + 56x6 + (1 * 28x6 + -1x * 28x6) + -8x7 * (1 + -1x) + 1x8 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -8x + 8x2 + 28x2 + -28x3 + -56x3 + 56x4 + 70x4 + -70x5 + -56x5 + 56x6 + (28x6 + -28x7) + -8x7 * (1 + -1x) + 1x8 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -8x + 8x2 + 28x2 + -28x3 + -56x3 + 56x4 + 70x4 + -70x5 + -56x5 + 56x6 + 28x6 + -28x7 + (1 * -8x7 + -1x * -8x7) + 1x8 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -8x + 8x2 + 28x2 + -28x3 + -56x3 + 56x4 + 70x4 + -70x5 + -56x5 + 56x6 + 28x6 + -28x7 + (-8x7 + 8x8) + 1x8 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -8x + 8x2 + 28x2 + -28x3 + -56x3 + 56x4 + 70x4 + -70x5 + -56x5 + 56x6 + 28x6 + -28x7 + -8x7 + 8x8 + (1 * 1x8 + -1x * 1x8))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -8x + 8x2 + 28x2 + -28x3 + -56x3 + 56x4 + 70x4 + -70x5 + -56x5 + 56x6 + 28x6 + -28x7 + -8x7 + 8x8 + (1x8 + -1x9))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -1x + -8x = -9x
1600 = 2500(1 + -9x + 8x2 + 28x2 + -28x3 + -56x3 + 56x4 + 70x4 + -70x5 + -56x5 + 56x6 + 28x6 + -28x7 + -8x7 + 8x8 + 1x8 + -1x9)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 8x2 + 28x2 = 36x2
1600 = 2500(1 + -9x + 36x2 + -28x3 + -56x3 + 56x4 + 70x4 + -70x5 + -56x5 + 56x6 + 28x6 + -28x7 + -8x7 + 8x8 + 1x8 + -1x9)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -28x3 + -56x3 = -84x3
1600 = 2500(1 + -9x + 36x2 + -84x3 + 56x4 + 70x4 + -70x5 + -56x5 + 56x6 + 28x6 + -28x7 + -8x7 + 8x8 + 1x8 + -1x9)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 56x4 + 70x4 = 126x4
1600 = 2500(1 + -9x + 36x2 + -84x3 + 126x4 + -70x5 + -56x5 + 56x6 + 28x6 + -28x7 + -8x7 + 8x8 + 1x8 + -1x9)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -70x5 + -56x5 = -126x5
1600 = 2500(1 + -9x + 36x2 + -84x3 + 126x4 + -126x5 + 56x6 + 28x6 + -28x7 + -8x7 + 8x8 + 1x8 + -1x9)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 56x6 + 28x6 = 84x6
1600 = 2500(1 + -9x + 36x2 + -84x3 + 126x4 + -126x5 + 84x6 + -28x7 + -8x7 + 8x8 + 1x8 + -1x9)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -28x7 + -8x7 = -36x7
1600 = 2500(1 + -9x + 36x2 + -84x3 + 126x4 + -126x5 + 84x6 + -36x7 + 8x8 + 1x8 + -1x9)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 8x8 + 1x8 = 9x8
1600 = 2500(1 + -9x + 36x2 + -84x3 + 126x4 + -126x5 + 84x6 + -36x7 + 9x8 + -1x9)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Multiply (1 + -9x + 36x2 + -84x3 + 126x4 + -126x5 + 84x6 + -36x7 + 9x8 + -1x9) * (1 + -1x)
1600 = 2500(1(1 + -1x) + -9x * (1 + -1x) + 36x2 * (1 + -1x) + -84x3 * (1 + -1x) + 126x4 * (1 + -1x) + -126x5 * (1 + -1x) + 84x6 * (1 + -1x) + -36x7 * (1 + -1x) + 9x8 * (1 + -1x) + -1x9 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500((1 * 1 + -1x * 1) + -9x * (1 + -1x) + 36x2 * (1 + -1x) + -84x3 * (1 + -1x) + 126x4 * (1 + -1x) + -126x5 * (1 + -1x) + 84x6 * (1 + -1x) + -36x7 * (1 + -1x) + 9x8 * (1 + -1x) + -1x9 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500((1 + -1x) + -9x * (1 + -1x) + 36x2 * (1 + -1x) + -84x3 * (1 + -1x) + 126x4 * (1 + -1x) + -126x5 * (1 + -1x) + 84x6 * (1 + -1x) + -36x7 * (1 + -1x) + 9x8 * (1 + -1x) + -1x9 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + (1 * -9x + -1x * -9x) + 36x2 * (1 + -1x) + -84x3 * (1 + -1x) + 126x4 * (1 + -1x) + -126x5 * (1 + -1x) + 84x6 * (1 + -1x) + -36x7 * (1 + -1x) + 9x8 * (1 + -1x) + -1x9 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + (-9x + 9x2) + 36x2 * (1 + -1x) + -84x3 * (1 + -1x) + 126x4 * (1 + -1x) + -126x5 * (1 + -1x) + 84x6 * (1 + -1x) + -36x7 * (1 + -1x) + 9x8 * (1 + -1x) + -1x9 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -9x + 9x2 + (1 * 36x2 + -1x * 36x2) + -84x3 * (1 + -1x) + 126x4 * (1 + -1x) + -126x5 * (1 + -1x) + 84x6 * (1 + -1x) + -36x7 * (1 + -1x) + 9x8 * (1 + -1x) + -1x9 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -9x + 9x2 + (36x2 + -36x3) + -84x3 * (1 + -1x) + 126x4 * (1 + -1x) + -126x5 * (1 + -1x) + 84x6 * (1 + -1x) + -36x7 * (1 + -1x) + 9x8 * (1 + -1x) + -1x9 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -9x + 9x2 + 36x2 + -36x3 + (1 * -84x3 + -1x * -84x3) + 126x4 * (1 + -1x) + -126x5 * (1 + -1x) + 84x6 * (1 + -1x) + -36x7 * (1 + -1x) + 9x8 * (1 + -1x) + -1x9 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -9x + 9x2 + 36x2 + -36x3 + (-84x3 + 84x4) + 126x4 * (1 + -1x) + -126x5 * (1 + -1x) + 84x6 * (1 + -1x) + -36x7 * (1 + -1x) + 9x8 * (1 + -1x) + -1x9 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -9x + 9x2 + 36x2 + -36x3 + -84x3 + 84x4 + (1 * 126x4 + -1x * 126x4) + -126x5 * (1 + -1x) + 84x6 * (1 + -1x) + -36x7 * (1 + -1x) + 9x8 * (1 + -1x) + -1x9 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -9x + 9x2 + 36x2 + -36x3 + -84x3 + 84x4 + (126x4 + -126x5) + -126x5 * (1 + -1x) + 84x6 * (1 + -1x) + -36x7 * (1 + -1x) + 9x8 * (1 + -1x) + -1x9 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -9x + 9x2 + 36x2 + -36x3 + -84x3 + 84x4 + 126x4 + -126x5 + (1 * -126x5 + -1x * -126x5) + 84x6 * (1 + -1x) + -36x7 * (1 + -1x) + 9x8 * (1 + -1x) + -1x9 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -9x + 9x2 + 36x2 + -36x3 + -84x3 + 84x4 + 126x4 + -126x5 + (-126x5 + 126x6) + 84x6 * (1 + -1x) + -36x7 * (1 + -1x) + 9x8 * (1 + -1x) + -1x9 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -9x + 9x2 + 36x2 + -36x3 + -84x3 + 84x4 + 126x4 + -126x5 + -126x5 + 126x6 + (1 * 84x6 + -1x * 84x6) + -36x7 * (1 + -1x) + 9x8 * (1 + -1x) + -1x9 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -9x + 9x2 + 36x2 + -36x3 + -84x3 + 84x4 + 126x4 + -126x5 + -126x5 + 126x6 + (84x6 + -84x7) + -36x7 * (1 + -1x) + 9x8 * (1 + -1x) + -1x9 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -9x + 9x2 + 36x2 + -36x3 + -84x3 + 84x4 + 126x4 + -126x5 + -126x5 + 126x6 + 84x6 + -84x7 + (1 * -36x7 + -1x * -36x7) + 9x8 * (1 + -1x) + -1x9 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -9x + 9x2 + 36x2 + -36x3 + -84x3 + 84x4 + 126x4 + -126x5 + -126x5 + 126x6 + 84x6 + -84x7 + (-36x7 + 36x8) + 9x8 * (1 + -1x) + -1x9 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -9x + 9x2 + 36x2 + -36x3 + -84x3 + 84x4 + 126x4 + -126x5 + -126x5 + 126x6 + 84x6 + -84x7 + -36x7 + 36x8 + (1 * 9x8 + -1x * 9x8) + -1x9 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -9x + 9x2 + 36x2 + -36x3 + -84x3 + 84x4 + 126x4 + -126x5 + -126x5 + 126x6 + 84x6 + -84x7 + -36x7 + 36x8 + (9x8 + -9x9) + -1x9 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -9x + 9x2 + 36x2 + -36x3 + -84x3 + 84x4 + 126x4 + -126x5 + -126x5 + 126x6 + 84x6 + -84x7 + -36x7 + 36x8 + 9x8 + -9x9 + (1 * -1x9 + -1x * -1x9))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -9x + 9x2 + 36x2 + -36x3 + -84x3 + 84x4 + 126x4 + -126x5 + -126x5 + 126x6 + 84x6 + -84x7 + -36x7 + 36x8 + 9x8 + -9x9 + (-1x9 + 1x10))(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -1x + -9x = -10x
1600 = 2500(1 + -10x + 9x2 + 36x2 + -36x3 + -84x3 + 84x4 + 126x4 + -126x5 + -126x5 + 126x6 + 84x6 + -84x7 + -36x7 + 36x8 + 9x8 + -9x9 + -1x9 + 1x10)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 9x2 + 36x2 = 45x2
1600 = 2500(1 + -10x + 45x2 + -36x3 + -84x3 + 84x4 + 126x4 + -126x5 + -126x5 + 126x6 + 84x6 + -84x7 + -36x7 + 36x8 + 9x8 + -9x9 + -1x9 + 1x10)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -36x3 + -84x3 = -120x3
1600 = 2500(1 + -10x + 45x2 + -120x3 + 84x4 + 126x4 + -126x5 + -126x5 + 126x6 + 84x6 + -84x7 + -36x7 + 36x8 + 9x8 + -9x9 + -1x9 + 1x10)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 84x4 + 126x4 = 210x4
1600 = 2500(1 + -10x + 45x2 + -120x3 + 210x4 + -126x5 + -126x5 + 126x6 + 84x6 + -84x7 + -36x7 + 36x8 + 9x8 + -9x9 + -1x9 + 1x10)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -126x5 + -126x5 = -252x5
1600 = 2500(1 + -10x + 45x2 + -120x3 + 210x4 + -252x5 + 126x6 + 84x6 + -84x7 + -36x7 + 36x8 + 9x8 + -9x9 + -1x9 + 1x10)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 126x6 + 84x6 = 210x6
1600 = 2500(1 + -10x + 45x2 + -120x3 + 210x4 + -252x5 + 210x6 + -84x7 + -36x7 + 36x8 + 9x8 + -9x9 + -1x9 + 1x10)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -84x7 + -36x7 = -120x7
1600 = 2500(1 + -10x + 45x2 + -120x3 + 210x4 + -252x5 + 210x6 + -120x7 + 36x8 + 9x8 + -9x9 + -1x9 + 1x10)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 36x8 + 9x8 = 45x8
1600 = 2500(1 + -10x + 45x2 + -120x3 + 210x4 + -252x5 + 210x6 + -120x7 + 45x8 + -9x9 + -1x9 + 1x10)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -9x9 + -1x9 = -10x9
1600 = 2500(1 + -10x + 45x2 + -120x3 + 210x4 + -252x5 + 210x6 + -120x7 + 45x8 + -10x9 + 1x10)(1 + -1x)(1 + -1x)(1 + -1x)(1 + -1x)

Multiply (1 + -10x + 45x2 + -120x3 + 210x4 + -252x5 + 210x6 + -120x7 + 45x8 + -10x9 + 1x10) * (1 + -1x)
1600 = 2500(1(1 + -1x) + -10x * (1 + -1x) + 45x2 * (1 + -1x) + -120x3 * (1 + -1x) + 210x4 * (1 + -1x) + -252x5 * (1 + -1x) + 210x6 * (1 + -1x) + -120x7 * (1 + -1x) + 45x8 * (1 + -1x) + -10x9 * (1 + -1x) + 1x10 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500((1 * 1 + -1x * 1) + -10x * (1 + -1x) + 45x2 * (1 + -1x) + -120x3 * (1 + -1x) + 210x4 * (1 + -1x) + -252x5 * (1 + -1x) + 210x6 * (1 + -1x) + -120x7 * (1 + -1x) + 45x8 * (1 + -1x) + -10x9 * (1 + -1x) + 1x10 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500((1 + -1x) + -10x * (1 + -1x) + 45x2 * (1 + -1x) + -120x3 * (1 + -1x) + 210x4 * (1 + -1x) + -252x5 * (1 + -1x) + 210x6 * (1 + -1x) + -120x7 * (1 + -1x) + 45x8 * (1 + -1x) + -10x9 * (1 + -1x) + 1x10 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + (1 * -10x + -1x * -10x) + 45x2 * (1 + -1x) + -120x3 * (1 + -1x) + 210x4 * (1 + -1x) + -252x5 * (1 + -1x) + 210x6 * (1 + -1x) + -120x7 * (1 + -1x) + 45x8 * (1 + -1x) + -10x9 * (1 + -1x) + 1x10 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + (-10x + 10x2) + 45x2 * (1 + -1x) + -120x3 * (1 + -1x) + 210x4 * (1 + -1x) + -252x5 * (1 + -1x) + 210x6 * (1 + -1x) + -120x7 * (1 + -1x) + 45x8 * (1 + -1x) + -10x9 * (1 + -1x) + 1x10 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -10x + 10x2 + (1 * 45x2 + -1x * 45x2) + -120x3 * (1 + -1x) + 210x4 * (1 + -1x) + -252x5 * (1 + -1x) + 210x6 * (1 + -1x) + -120x7 * (1 + -1x) + 45x8 * (1 + -1x) + -10x9 * (1 + -1x) + 1x10 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -10x + 10x2 + (45x2 + -45x3) + -120x3 * (1 + -1x) + 210x4 * (1 + -1x) + -252x5 * (1 + -1x) + 210x6 * (1 + -1x) + -120x7 * (1 + -1x) + 45x8 * (1 + -1x) + -10x9 * (1 + -1x) + 1x10 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -10x + 10x2 + 45x2 + -45x3 + (1 * -120x3 + -1x * -120x3) + 210x4 * (1 + -1x) + -252x5 * (1 + -1x) + 210x6 * (1 + -1x) + -120x7 * (1 + -1x) + 45x8 * (1 + -1x) + -10x9 * (1 + -1x) + 1x10 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -10x + 10x2 + 45x2 + -45x3 + (-120x3 + 120x4) + 210x4 * (1 + -1x) + -252x5 * (1 + -1x) + 210x6 * (1 + -1x) + -120x7 * (1 + -1x) + 45x8 * (1 + -1x) + -10x9 * (1 + -1x) + 1x10 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -10x + 10x2 + 45x2 + -45x3 + -120x3 + 120x4 + (1 * 210x4 + -1x * 210x4) + -252x5 * (1 + -1x) + 210x6 * (1 + -1x) + -120x7 * (1 + -1x) + 45x8 * (1 + -1x) + -10x9 * (1 + -1x) + 1x10 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -10x + 10x2 + 45x2 + -45x3 + -120x3 + 120x4 + (210x4 + -210x5) + -252x5 * (1 + -1x) + 210x6 * (1 + -1x) + -120x7 * (1 + -1x) + 45x8 * (1 + -1x) + -10x9 * (1 + -1x) + 1x10 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -10x + 10x2 + 45x2 + -45x3 + -120x3 + 120x4 + 210x4 + -210x5 + (1 * -252x5 + -1x * -252x5) + 210x6 * (1 + -1x) + -120x7 * (1 + -1x) + 45x8 * (1 + -1x) + -10x9 * (1 + -1x) + 1x10 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -10x + 10x2 + 45x2 + -45x3 + -120x3 + 120x4 + 210x4 + -210x5 + (-252x5 + 252x6) + 210x6 * (1 + -1x) + -120x7 * (1 + -1x) + 45x8 * (1 + -1x) + -10x9 * (1 + -1x) + 1x10 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -10x + 10x2 + 45x2 + -45x3 + -120x3 + 120x4 + 210x4 + -210x5 + -252x5 + 252x6 + (1 * 210x6 + -1x * 210x6) + -120x7 * (1 + -1x) + 45x8 * (1 + -1x) + -10x9 * (1 + -1x) + 1x10 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -10x + 10x2 + 45x2 + -45x3 + -120x3 + 120x4 + 210x4 + -210x5 + -252x5 + 252x6 + (210x6 + -210x7) + -120x7 * (1 + -1x) + 45x8 * (1 + -1x) + -10x9 * (1 + -1x) + 1x10 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -10x + 10x2 + 45x2 + -45x3 + -120x3 + 120x4 + 210x4 + -210x5 + -252x5 + 252x6 + 210x6 + -210x7 + (1 * -120x7 + -1x * -120x7) + 45x8 * (1 + -1x) + -10x9 * (1 + -1x) + 1x10 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -10x + 10x2 + 45x2 + -45x3 + -120x3 + 120x4 + 210x4 + -210x5 + -252x5 + 252x6 + 210x6 + -210x7 + (-120x7 + 120x8) + 45x8 * (1 + -1x) + -10x9 * (1 + -1x) + 1x10 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -10x + 10x2 + 45x2 + -45x3 + -120x3 + 120x4 + 210x4 + -210x5 + -252x5 + 252x6 + 210x6 + -210x7 + -120x7 + 120x8 + (1 * 45x8 + -1x * 45x8) + -10x9 * (1 + -1x) + 1x10 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -10x + 10x2 + 45x2 + -45x3 + -120x3 + 120x4 + 210x4 + -210x5 + -252x5 + 252x6 + 210x6 + -210x7 + -120x7 + 120x8 + (45x8 + -45x9) + -10x9 * (1 + -1x) + 1x10 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -10x + 10x2 + 45x2 + -45x3 + -120x3 + 120x4 + 210x4 + -210x5 + -252x5 + 252x6 + 210x6 + -210x7 + -120x7 + 120x8 + 45x8 + -45x9 + (1 * -10x9 + -1x * -10x9) + 1x10 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -10x + 10x2 + 45x2 + -45x3 + -120x3 + 120x4 + 210x4 + -210x5 + -252x5 + 252x6 + 210x6 + -210x7 + -120x7 + 120x8 + 45x8 + -45x9 + (-10x9 + 10x10) + 1x10 * (1 + -1x))(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -10x + 10x2 + 45x2 + -45x3 + -120x3 + 120x4 + 210x4 + -210x5 + -252x5 + 252x6 + 210x6 + -210x7 + -120x7 + 120x8 + 45x8 + -45x9 + -10x9 + 10x10 + (1 * 1x10 + -1x * 1x10))(1 + -1x)(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -10x + 10x2 + 45x2 + -45x3 + -120x3 + 120x4 + 210x4 + -210x5 + -252x5 + 252x6 + 210x6 + -210x7 + -120x7 + 120x8 + 45x8 + -45x9 + -10x9 + 10x10 + (1x10 + -1x11))(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -1x + -10x = -11x
1600 = 2500(1 + -11x + 10x2 + 45x2 + -45x3 + -120x3 + 120x4 + 210x4 + -210x5 + -252x5 + 252x6 + 210x6 + -210x7 + -120x7 + 120x8 + 45x8 + -45x9 + -10x9 + 10x10 + 1x10 + -1x11)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 10x2 + 45x2 = 55x2
1600 = 2500(1 + -11x + 55x2 + -45x3 + -120x3 + 120x4 + 210x4 + -210x5 + -252x5 + 252x6 + 210x6 + -210x7 + -120x7 + 120x8 + 45x8 + -45x9 + -10x9 + 10x10 + 1x10 + -1x11)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -45x3 + -120x3 = -165x3
1600 = 2500(1 + -11x + 55x2 + -165x3 + 120x4 + 210x4 + -210x5 + -252x5 + 252x6 + 210x6 + -210x7 + -120x7 + 120x8 + 45x8 + -45x9 + -10x9 + 10x10 + 1x10 + -1x11)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 120x4 + 210x4 = 330x4
1600 = 2500(1 + -11x + 55x2 + -165x3 + 330x4 + -210x5 + -252x5 + 252x6 + 210x6 + -210x7 + -120x7 + 120x8 + 45x8 + -45x9 + -10x9 + 10x10 + 1x10 + -1x11)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -210x5 + -252x5 = -462x5
1600 = 2500(1 + -11x + 55x2 + -165x3 + 330x4 + -462x5 + 252x6 + 210x6 + -210x7 + -120x7 + 120x8 + 45x8 + -45x9 + -10x9 + 10x10 + 1x10 + -1x11)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 252x6 + 210x6 = 462x6
1600 = 2500(1 + -11x + 55x2 + -165x3 + 330x4 + -462x5 + 462x6 + -210x7 + -120x7 + 120x8 + 45x8 + -45x9 + -10x9 + 10x10 + 1x10 + -1x11)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -210x7 + -120x7 = -330x7
1600 = 2500(1 + -11x + 55x2 + -165x3 + 330x4 + -462x5 + 462x6 + -330x7 + 120x8 + 45x8 + -45x9 + -10x9 + 10x10 + 1x10 + -1x11)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 120x8 + 45x8 = 165x8
1600 = 2500(1 + -11x + 55x2 + -165x3 + 330x4 + -462x5 + 462x6 + -330x7 + 165x8 + -45x9 + -10x9 + 10x10 + 1x10 + -1x11)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: -45x9 + -10x9 = -55x9
1600 = 2500(1 + -11x + 55x2 + -165x3 + 330x4 + -462x5 + 462x6 + -330x7 + 165x8 + -55x9 + 10x10 + 1x10 + -1x11)(1 + -1x)(1 + -1x)(1 + -1x)

Combine like terms: 10x10 + 1x10 = 11x10
1600 = 2500(1 + -11x + 55x2 + -165x3 + 330x4 + -462x5 + 462x6 + -330x7 + 165x8 + -55x9 + 11x10 + -1x11)(1 + -1x)(1 + -1x)(1 + -1x)

Multiply (1 + -11x + 55x2 + -165x3 + 330x4 + -462x5 + 462x6 + -330x7 + 165x8 + -55x9 + 11x10 + -1x11) * (1 + -1x)
1600 = 2500(1(1 + -1x) + -11x * (1 + -1x) + 55x2 * (1 + -1x) + -165x3 * (1 + -1x) + 330x4 * (1 + -1x) + -462x5 * (1 + -1x) + 462x6 * (1 + -1x) + -330x7 * (1 + -1x) + 165x8 * (1 + -1x) + -55x9 * (1 + -1x) + 11x10 * (1 + -1x) + -1x11 * (1 + -1x))(1 + -1x)(1 + -1x)
1600 = 2500((1 * 1 + -1x * 1) + -11x * (1 + -1x) + 55x2 * (1 + -1x) + -165x3 * (1 + -1x) + 330x4 * (1 + -1x) + -462x5 * (1 + -1x) + 462x6 * (1 + -1x) + -330x7 * (1 + -1x) + 165x8 * (1 + -1x) + -55x9 * (1 + -1x) + 11x10 * (1 + -1x) + -1x11 * (1 + -1x))(1 + -1x)(1 + -1x)
1600 = 2500((1 + -1x) + -11x * (1 + -1x) + 55x2 * (1 + -1x) + -165x3 * (1 + -1x) + 330x4 * (1 + -1x) + -462x5 * (1 + -1x) + 462x6 * (1 + -1x) + -330x7 * (1 + -1x) + 165x8 * (1 + -1x) + -55x9 * (1 + -1x) + 11x10 * (1 + -1x) + -1x11 * (1 + -1x))(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + (1 * -11x + -1x * -11x) + 55x2 * (1 + -1x) + -165x3 * (1 + -1x) + 330x4 * (1 + -1x) + -462x5 * (1 + -1x) + 462x6 * (1 + -1x) + -330x7 * (1 + -1x) + 165x8 * (1 + -1x) + -55x9 * (1 + -1x) + 11x10 * (1 + -1x) + -1x11 * (1 + -1x))(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + (-11x + 11x2) + 55x2 * (1 + -1x) + -165x3 * (1 + -1x) + 330x4 * (1 + -1x) + -462x5 * (1 + -1x) + 462x6 * (1 + -1x) + -330x7 * (1 + -1x) + 165x8 * (1 + -1x) + -55x9 * (1 + -1x) + 11x10 * (1 + -1x) + -1x11 * (1 + -1x))(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -11x + 11x2 + (1 * 55x2 + -1x * 55x2) + -165x3 * (1 + -1x) + 330x4 * (1 + -1x) + -462x5 * (1 + -1x) + 462x6 * (1 + -1x) + -330x7 * (1 + -1x) + 165x8 * (1 + -1x) + -55x9 * (1 + -1x) + 11x10 * (1 + -1x) + -1x11 * (1 + -1x))(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -11x + 11x2 + (55x2 + -55x3) + -165x3 * (1 + -1x) + 330x4 * (1 + -1x) + -462x5 * (1 + -1x) + 462x6 * (1 + -1x) + -330x7 * (1 + -1x) + 165x8 * (1 + -1x) + -55x9 * (1 + -1x) + 11x10 * (1 + -1x) + -1x11 * (1 + -1x))(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -11x + 11x2 + 55x2 + -55x3 + (1 * -165x3 + -1x * -165x3) + 330x4 * (1 + -1x) + -462x5 * (1 + -1x) + 462x6 * (1 + -1x) + -330x7 * (1 + -1x) + 165x8 * (1 + -1x) + -55x9 * (1 + -1x) + 11x10 * (1 + -1x) + -1x11 * (1 + -1x))(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -11x + 11x2 + 55x2 + -55x3 + (-165x3 + 165x4) + 330x4 * (1 + -1x) + -462x5 * (1 + -1x) + 462x6 * (1 + -1x) + -330x7 * (1 + -1x) + 165x8 * (1 + -1x) + -55x9 * (1 + -1x) + 11x10 * (1 + -1x) + -1x11 * (1 + -1x))(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -11x + 11x2 + 55x2 + -55x3 + -165x3 + 165x4 + (1 * 330x4 + -1x * 330x4) + -462x5 * (1 + -1x) + 462x6 * (1 + -1x) + -330x7 * (1 + -1x) + 165x8 * (1 + -1x) + -55x9 * (1 + -1x) + 11x10 * (1 + -1x) + -1x11 * (1 + -1x))(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -11x + 11x2 + 55x2 + -55x3 + -165x3 + 165x4 + (330x4 + -330x5) + -462x5 * (1 + -1x) + 462x6 * (1 + -1x) + -330x7 * (1 + -1x) + 165x8 * (1 + -1x) + -55x9 * (1 + -1x) + 11x10 * (1 + -1x) + -1x11 * (1 + -1x))(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -11x + 11x2 + 55x2 + -55x3 + -165x3 + 165x4 + 330x4 + -330x5 + (1 * -462x5 + -1x * -462x5) + 462x6 * (1 + -1x) + -330x7 * (1 + -1x) + 165x8 * (1 + -1x) + -55x9 * (1 + -1x) + 11x10 * (1 + -1x) + -1x11 * (1 + -1x))(1 + -1x)(1 + -1x)
1600 = 2500(1 + -1x + -11x + 11x2 + 55x
			
	
			

			
			

							

									
									
									
									
									
									

														
			

			
				

						
				
				
					
			
						
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