1. ((a + 6)/(a ^ 2 - 4) - 2/(a ^ 2 + 2a)) / ((a + 2)/(a ^ 2 - 2a))

2. 4/(1 + x) - (x + 1)/(x - 1) = (3 - x ^ 2)/(x ^ 2 - 1)

3. (2x - 1)/(2x + 1) + (2x + 1)/(1 - 2x) = 8/(1 - 4x ^ 2)

Срочноооооо !!! 35 баллов !
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