计算或化简:(1)(1/a-1)÷(a²-1)/(a²+a)；(2)(x²+2x+1)/(x+2)÷(x²-1)/(x-1)-x/(x+2).

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计算或化简:(1)(1/a-1)÷(a²-1)/(a²+a)；(2)(x²+2x+1)/(x+2)÷(x²-1)/(x-1)-x/(x+2).

计算或化简:(1)(1/a-1)÷(a²-1)/(a²+a)；(2)(x²+2x+1)/(x+2)÷(x²-1)/(x-1)-x/(x+2).
计算或化简:(1)(1/a-1)÷(a²-1)/(a²+a)；(2)(x²+2x+1)/(x+2)÷(x²-1)/(x-1)-x/(x+2).

计算或化简:(1)(1/a-1)÷(a²-1)/(a²+a)；(2)(x²+2x+1)/(x+2)÷(x²-1)/(x-1)-x/(x+2).
点击[http://pinyin.cn/1mSmTxvwWE1] 查看这张图片.