=(16a² -1) *((4a -1) -(4a+1)) /(4a -1)(4a +1) =(16a² -1)(4a -1 -4a -1) /(16a² -1) = -2
ответ: -2
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=(16a² -1) *((4a -1) -(4a+1)) /(4a -1)(4a +1) =(16a² -1)(4a -1 -4a -1) /(16a² -1) = -2
ответ: -2