I dont understand how to simplify an expression with exponents

Answer:
3^4
Step-by-step explanation:
Simplifying an expression with expression with exponents:
If they are dividing, we keep the base and subtract the exponents. For example:
[tex]\frac{a^x}{a^y}=a^{x-y}[/tex]In this question:
[tex]\frac{3^2}{3^{-2}}=3^{2-(-2)}=3^{2+2}=3^4[/tex]