Помоги.!!! 

(a-b + [tex] \frac{4ab}{a-b} [/tex]) ÷([tex] \frac{a}{a+b} [/tex] - [tex] \frac{2ab}{b2 –a2} [/tex])
Помогите решить 9 класс
в конце Б и А во второй степени
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