Answer
$\frac{m^{9}p^{9}}{n^{9}}, n\ne0$
Work Step by Step
Based on the power of a quotient rule, we know that $(\frac{a}{c})^{n}=\frac{a^{n}}{c^{n}}$ (where $n$ is a positive integer and $a$ and $c$ are real numbers).
Therefore, $(\frac{mp}{n})^{9}=\frac{m^{9}p^{9}}{n^{9}}, n\ne0$.
