Simplify d3 / d5
\(\frac{d^3}{d^5} = d^3 * d^{-5} = d^{3-5} = d^{-2} \)
\(\frac{d^3}{d^5}=\frac{\frac{d^3}{d^3}}{\frac{d^5}{d^3}}= \frac{1}{d^2}\)
