Answer
$xy^2$
Work Step by Step
$\frac{x^2}{y}\times\frac{y^3}{x}=\frac{x^2\times y^3}{y\times x}=\frac{x^2y^3}{xy}=\frac{x^2y^3\div xy}{xy\div xy}=\frac{xy^2}{1}=xy^2$
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