Express your answer as a polynomial in standard form.
$\begin{array}{l}
f(x)=3 x^2+x-12 \\
g(x)=-3 x-15
\end{array}$
Find: $(g \circ f)(x)$
$\begin{array}{l}
f(x)=3 x^2+x-12 \\
g(x)=-3 x-15
\end{array}$
Find: $(g \circ f)(x)$