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f(5)-f(4)=3(5)-3(4)-7
We move all terms to the left:
f(5)-f(4)-(3(5)-3(4)-7)=0
We add all the numbers together, and all the variables
f5-f4-(-6)=0
We add all the numbers together, and all the variables
f^5-1f^4+6=0
We do not support efpression: f^5
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