Laugh out loud a pun isn't it
is there a table or something you can add because I cant tell anything with the information you gave.
F(x) = 2x and G(x) = x^2 + 2
(G - F)(x) just means we subtract the functions from each other.
x^2 + 2 - 2x
Let's rearrange the expression
x^2 - 2x + 2