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(4x+15)(2x+5)(2x)=180
We move all terms to the left:
(4x+15)(2x+5)(2x)-(180)=0
We multiply parentheses ..
(+8x^2+20x+30x+75)2x-180=0
We multiply parentheses
16x^3+40x^2+60x^2+150x-180=0
We do not support expression: x^3
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