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f(7)=f(6)+7
We move all terms to the left:
f(7)-(f(6)+7)=0
We add all the numbers together, and all the variables
-(+f^6+7)+f7=0
We add all the numbers together, and all the variables
f^7-(+f^6+7)=0
We get rid of parentheses
f^7-f^6-7=0
We do not support efpression: f^7
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