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8*x^(2^3)+16/(2^2)-((1/2)*(4*3^2-25)^2) = 0
8*x^(2^3)+16/(2^2)+(-1/2)*(4*3^2-25)^2 = 0
8*x^8 = 113/2 // : 8
x^8 = 113/16
x^8 = 113/16 // ^ 1/8
abs(x) = (113/16)^(1/8)
x = (113/16)^(1/8) or x = -(113/16)^(1/8)
x in { (113/16)^(1/8), -(113/16)^(1/8) }
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