Question 1103945
Answered already but it would help if you write your functions fully in pure text and then surround by the triple braces rendering tag.

g(x)=x^2+1

{{{g(x)=x^2+1}}}


{{{f(4)+g(4)}}}
{{{2*4+(4^2+1)}}}
{{{8+17}}}
{{{25}}}