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\frac{x}{y}

\frac{x}{y}

\frac{x^{2} - y^{2}}{x y}

\frac{2 x^{2} - y^{2}}{x y}

\frac{y^{2} - x^{2}}{x y}

\frac{x^{2} - 2 y^{2}}{x y}

ANS : 3

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