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x(5)=x(3)+20
We move all terms to the left:
x(5)-(x(3)+20)=0
We add all the numbers together, and all the variables
-(+x^3+20)+x5=0
We add all the numbers together, and all the variables
x^5-(+x^3+20)=0
We get rid of parentheses
x^5-x^3-20=0
We do not support expression: x^5
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