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(-4x+40)+(x+50)x2=180
We move all terms to the left:
(-4x+40)+(x+50)x2-(180)=0
We multiply parentheses
x^3+50x^2+(-4x+40)-180=0
We get rid of parentheses
x^3+50x^2-4x+40-180=0
We do not support expression: x^3
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