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x(4+9)=3x+4
We move all terms to the left:
x(4+9)-(3x+4)=0
We add all the numbers together, and all the variables
x13-(3x+4)=0
We add all the numbers together, and all the variables
x^13-(3x+4)=0
We get rid of parentheses
x^13-3x-4=0
We do not support expression: x^13
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