f(4)=4+9

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Solution for f(4)=4+9 equation: 



f(4)=4+9

We move all terms to the left:

f(4)-(4+9)=0

We add all the numbers together, and all the variables

f4-13=0

We add all the numbers together, and all the variables

f^4-13=0

We do not support efpression: f^4

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