若-2≦a≦0,化简/a+2/+/a-2/
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若-2≦a≦0,化简/a+2/+/a-2/若-2≦a≦0,化简/a+2/+/a-2/若-2≦a≦0,化简/a+2/+/a-2/
若-2≦a≦0,化简/a+2/+/a-2/
若-2≦a≦0,化简/a+2/+/a-2/
若-2≦a≦0,化简/a+2/+/a-2/
化简(a/a-2-a/a+2)×4-a/a(a/a-2-a/a+2)×4-a/a
若-2≦a≦0,化简/a+2/+/a-2/
若a是有理数且a不等于0,化简a-|a|/|2a|的结果是
若-a>2a,则a>0,a
化简(2a-a*a)(a*a+4a+3)/(a*a*a+a*a)(a*a+a-6),并求当4a+3/a=0时,此分式的值
若a>0,-2a
若a>0,-2a
2a+a²/a-a 化简.(2a+a²/a)-a
化简; a-2a+3a-4a+5a-6a+``````-2006a+2007a.
化简:a-2a+3a-4a+5a-6a+.+2010a+2011a.
[a/(a-1)+a/(a+2)](a+2)/(2a平方+3a+1)化简
化简(a/a-2-a/a+3)*a^2+a-6/a
化简:[2/3a - 2/(a+b) * (a+b/3a - a - b)] / (a-b)/a
已知a×a+a-1=0求a*a*a+2a+3
化简2a(a-1/2)+a
化简:(1-a)^2/a-1 (a
化简:a-[b-2a-(a-b)]
化简:2A+0.5A-6A