化简(a+1)(a-2)/(a+2)(a-2)+3
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化简(a+1)(a-2)/(a+2)(a-2)+3化简(a+1)(a-2)/(a+2)(a-2)+3化简(a+1)(a-2)/(a+2)(a-2)+3=(a+1)(a-2)/(a²-4+3)
化简(a+1)(a-2)/(a+2)(a-2)+3
化简(a+1)(a-2)/(a+2)(a-2)+3
化简(a+1)(a-2)/(a+2)(a-2)+3
=(a+1)(a-2)/(a²-4+3)
=(a+1)(a-2)/(a²-1)
=(a+1)(a-2)/(a+1)(a-1)
=(a-2)/(a-1)
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