We can break this up in the following manner:
(4 / -2) * (x^5 / x^3) * (y^-4 / y^4) (I'm assuming those are exponents on the "y's")
So we have
-2 * x^2 * (y^-4 * y^-4) =
-2x2y-8
YOU NEED TO USE BRACKETS WITH QUESTIONS LIKE THESE.
OTHERWISE WE ARE JUST GUESSING WHAT YOU MEAN !
Melody , i think after that expression , all Anonymouses are going to be in discipline while posting question!lol!