化简:(2a+1/a²-1)*a²-2a+1/a²-a-(1/a+1)

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化简:(2a+1/a²-1)*a²-2a+1/a²-a-(1/a+1)
化简:(2a+1/a²-1)*a²-2a+1/a²-a-(1/a+1)

化简:(2a+1/a²-1)*a²-2a+1/a²-a-(1/a+1)
原式=(2a+1)/[(a+1)(a-1)]*(a-1)^2/[a(a-1)]-(a+1)/a
=(2a+1)/a-(a+1)/a
=a/a
=1.