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-4x+51=2x+7(x11)
We move all terms to the left:
-4x+51-(2x+7(x11))=0
We add all the numbers together, and all the variables
-(+2x+7x^11)-4x+51=0
We get rid of parentheses
-7x^11-2x-4x+51=0
We do not support expression: x^11
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