Question

Simplify the expression

Answer 1

For this case, what we should do is follow the following steps:
 1) rewrite the expression using power properties
 2) cancel similar terms
 3) add exponents that have the same base.
 Answer:
 See attached image

Answer 2

$\cfrac{r^{-3}s^5t^2}{r^2st^{-2}}$

$= r^{-3-2}s^{5-1}t^{2+2}$

$= r^{-5}s^4t^4$

$= \cfrac{s^4t^4}{r^5}$