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260+x20=140+x30
We move all terms to the left:
260+x20-(140+x30)=0
We add all the numbers together, and all the variables
-(+x^30+140)+x20+260=0
We add all the numbers together, and all the variables
x^20-(+x^30+140)+260=0
We get rid of parentheses
x^20-x^30-140+260=0
We do not support expression: x^20
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