TeX source:
\begin{array}{rcl} f'(x) &=& 4\left(h(x)\right)^3 \cdot h'(x) \cr &=& 4\left(x^3+5x^2-32\right)^3\cdot\left(3x^2+10x\right) \cr &=& \left(12x^2+40x\right)\cdot\left(x^3+5x^2-32\right)^3\end{array}