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x3-5=x4-9
We move all terms to the left:
x3-5-(x4-9)=0
We add all the numbers together, and all the variables
-(+x^4-9)+x3-5=0
We add all the numbers together, and all the variables
x^3-(+x^4-9)-5=0
We get rid of parentheses
x^3-x^4+9-5=0
We do not support expression: x^3
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