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x3-x2=x4-x2
We move all terms to the left:
x3-x2-(x4-x2)=0
We add all the numbers together, and all the variables
-(+x^4-1x^2)+x3-x2=0
We add all the numbers together, and all the variables
x^3-1x^2-(+x^4-1x^2)=0
We get rid of parentheses
x^3-1x^2-x^4+1x^2=0
We do not support expression: x^3
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