Виконайте дії:
а)
[tex]( \frac{m}{m - 1} - 1) \times \frac{mn - n}{m} [/tex]
б)
[tex] \frac{4 {a}^{2} - 9 }{9 {a}^{2} - 6a + 1 } \div \frac{2a - 3}{3a - 1} + \frac{4 - a}{1 - 3a} [/tex]
в)
[tex]( \frac{ {x }^{2 } -5x }{ {x}^{2} - 10x \ + 25 } + \frac{25}{ {x}^{2} - 25 } ) \times \frac{5 + x}{125 - {x}^{3} } [/tex]
Даю 5 балів
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