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x9-138=x3-12
We move all terms to the left:
x9-138-(x3-12)=0
We add all the numbers together, and all the variables
-(+x^3-12)+x9-138=0
We add all the numbers together, and all the variables
x^9-(+x^3-12)-138=0
We get rid of parentheses
x^9-x^3+12-138=0
We do not support expression: x^9
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