( \frac{ {a}^{2} }{2} - \frac{a}{ \sqrt{2} } + 1)( \frac{ {a}^{2} }{2} + \frac{a}{ \sqrt{2} } + 1) \times \frac{ \sqrt{2} }{a{ }^{4} + 2a {}^{2} + 4 }(2a2​−2​a​+1)(2a2​+2​a​+1)×a4+2a2+42​​
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elag    3   08.10.2019 20:55    3