I need help with this it’s exponents I can’t have negative exponents

Answer:
s^4/r^2
Step-by-step explanation:
r^-2/ s^-4
When the exponent is negative, it moves from the numerator to the denominator or from the denominator to the numerator
r^-2 becomes 1 /r^2
1 / s^-4 becomes s^4
r^-2/ s^-4 = s^4/r^2