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x(x+1)(x+2)=120
We move all terms to the left:
x(x+1)(x+2)-(120)=0
We multiply parentheses ..
x(+x^2+2x+x+2)-120=0
We multiply parentheses
x^3+2x^2+x^2+2x-120=0
We do not support expression: x^3
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