Упростите выражение:
[tex] \frac{1}{ x^{2} - 2xy} + \frac{2}{4y^{2}- x^{2} } - \frac{1}{ x^{2} + 2xy} [/tex]
[tex] \frac{1}{ x^{2} - 2xy} + \frac{2}{4y^{2}- x^{2} } - \frac{1}{ x^{2} + 2xy} [/tex]
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