x^3 y/10
((5x^2y^-5)^-1)/2x^-5y^4
=x^3/10y^-1
=x^3y/10
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x^3 y/10
((5x^2y^-5)^-1)/2x^-5y^4
=x^3/10y^-1
=x^3y/10