(a)[1]
Find the value of $g(3)$.
(b)[2]
Find $f(-2)$ and give your answer in its simplest form.
(c)[2]
Find the inverse function, $f^{-1}(x)$.
(d)[5]
Since $gf(x)-g(x)f(x)=3x^3+ax^2+bx+c$, find the value of each of $a$, $b$ and $c$.
(e)[3]
Find $h(x)-f(x)$, and present your answer as a single fraction in simplest form.
(f)[1]
Given $h(x^n)=3x^7$, find the value of $n$.