Answer
$\frac{1}{243s^{40}}$
Work Step by Step
The given expression is
$=(3s^8)^{-5}$
Use $a^{-n}=\frac{1}{a^n}$.
$=\frac{1}{(3s^8)^5}$
Use $(ab)^n=a^nb^n$.
$=\frac{1}{3^5(s^8)^5}$
Use $(a^m)^n=a^{m\cdot n}$.
$=\frac{1}{3^5s^{8\cdot 5}}$
Use $3^5=243$.
$=\frac{1}{243s^{40}}$.
