2 answers:
I believe this would be the solution.
First of all, turn the entire problem (except for the exponent) upside down. This will change the sign of your exponent (-2) to positive (2).
(x)^2=x^2
(y^4)^2 = y^8
The new numerator is thus (x^2)(y*8). What's the denominator going to look like?
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