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(4x-10)(2x+6)(x)=2680
We move all terms to the left:
(4x-10)(2x+6)(x)-(2680)=0
We multiply parentheses ..
(+8x^2+24x-20x-60)x-2680=0
We multiply parentheses
8x^3+24x^2-20x^2-60x-2680=0
We do not support expression: x^3
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