помогите пожалуйста 60 баллов
[tex]( \frac{u^{2} - 2u + 4}{4u ^{2} - 1 } \times \frac{2u ^ {2} + u}{u ^{3} + 8} - \frac{u + 2}{ {2u}^{2} - u} ) \div \frac{5}{ {u}^{2} + 2u} - \frac{10u + 1}{5 - 10u} [/tex]
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