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3x(2+1)=(x2)+(x1)
We move all terms to the left:
3x(2+1)-((x2)+(x1))=0
We add all the numbers together, and all the variables
-(+x^2+x)+3x3=0
We add all the numbers together, and all the variables
3x^3-(+x^2+x)=0
We get rid of parentheses
3x^3-x^2-x=0
We do not support expression: x^3
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