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(3)=F3-5F-4F+20
We move all terms to the left:
(3)-(F3-5F-4F+20)=0
We add all the numbers together, and all the variables
-(+F^3-9F+20)+3=0
We get rid of parentheses
-F^3+9F-20+3=0
We do not support eFpression: F^3
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