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f(6)=f(6-1)+100
We move all terms to the left:
f(6)-(f(6-1)+100)=0
We add all the numbers together, and all the variables
f6-(f5+100)=0
We add all the numbers together, and all the variables
f^6-(f5+100)=0
We get rid of parentheses
f^6-f5-100=0
We do not support efpression: f^6
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