计算:a+2/a²-2a * a²-4a+4/a+2
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计算:a+2/a²-2a*a²-4a+4/a+2计算:a+2/a²-2a*a²-4a+4/a+2计算:a+2/a²-2a*a²-4a+4/a
计算:a+2/a²-2a * a²-4a+4/a+2
计算:a+2/a²-2a * a²-4a+4/a+2
计算:a+2/a²-2a * a²-4a+4/a+2
原式=(a+2)/a(a-2)*(a-2)^2/(a+2)
=(a-2)/a