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f(10)=f(10-2)+f(10-1)
We move all terms to the left:
f(10)-(f(10-2)+f(10-1))=0
We add all the numbers together, and all the variables
f10-(f8+f9)=0
We add all the numbers together, and all the variables
f^10-(f8+f9)=0
We get rid of parentheses
f^10-f8-f9=0
We do not support efpression: f^10
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