(a-b)(-a-b)化简?
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化简|a|+|-b|-|a-b|-|a+b|
化简 |b|-|a|+|a-b|+|a+b|
化简 |a-b|+|a+b|-|a-b|
化简|a+b|-|a-b|
(a-b)(-a-b)化简?
化简：|a+b|+|b-a|+|2b|
|b|-|a-b|-|a+b|化简
化简(2a-b/a+b-b/a-b)除以a-2b/a+b
化简(2a-b/a+b-b/a-b)除以a-2b/a +b
化简：{[(2a-b)/(a+b)]-[b/(a-b)]}÷[(a-2b)/(a+b)]
化简：a-[b-2a-(a-b)]
a-b0,化简/a-b/+/b-a/
化简（2a-b/a+b-b/a-b）÷a-2a/a-b
a,b互为相反数.化简|a+b|-|a|-|b-a|
化简|a-b|+|b+a|+|b|-|a-||已知a
化简:[2/3a - 2/(a+b) * (a+b/3a - a - b)] / (a-b)/a
(a+b).(a-b)
a/b-b/a