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| 1. |
The simplified form of the national expression \left(\frac{x^{2}}{x^{2}-y^{2}}-1\right)\left(\frac{x-y}{y}+2\right) is:\begin{array}{ll}{\text { (A) } \frac{x}{(x+y)}} & {\text { (B) } \frac{y}{(x+y)}}\end{array} \quad(C) \frac{y}{(x-y)} (D) $\frac{x}{(x-y)}$ |
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