Спасайте, упростите, очень прошу, дам 100 баллов [tex](\frac{1+x+x^{2} }{2x+x^{2} } +2-\frac{1-x+x^{2} }{2x-x^{2} } )^{-1} *(5-2x^{2} )[/tex]
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