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Simplify. Express the answer with positive exponents.

(5xy^-2/y^2)^-3

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((5xy^(-2))/(y^(2)))^(-3) = ((5x)/(y^(4)))^(-3) = ((y^(4))/(5x))^(3) = ((y^(4))^(3))/((5x)^(3)) = (y^(12))/(5x^(3))
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