Question

Can sum one help me again plss

Answer 1

Negative exponents can be reciprocated in order to eliminate the negative, so
\[\Large r^{-5}+s^{-12} \]
can be re-written as:

\[ \Large \frac{1}{r^5} + \frac{1}{s^{12}} \]
And since there are no like bases/terms.. this is as simplified as it can get.