f(3)=9+12

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Solution for f(3)=9+12 equation: 



f(3)=9+12

We move all terms to the left:

f(3)-(9+12)=0

We add all the numbers together, and all the variables

f3-21=0

We add all the numbers together, and all the variables

f^3-21=0

We do not support efpression: f^3

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