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Answer»

[ (x^4)^1/3y * (xy^4)^-1/2]^-4= {(x)^[4/3 - 1/2]*(y)^[1 - 2]}^-4={(x)^[5/6] * (y)^-1}^-4= x^[-10/3]*(y)^4= y^4 / x^10/3



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