F(X)=X^2+6X, G(X)=X-7, AND H9X)=X+4

Answer 1

ok, now what?
(f◦g)(x) = f(g) = g^2+6g = (x-7)^2 + 6(x-7) = x^2 - 8x + 7
But maybe you had something else in mind.
Oh, and you can STOP SHOUTING ...