化简(a+b)(a-b)-(3a-2b)(3a+2b)

化简:[2/3a - 2/(a+b) * (a+b/3a - a - b)] / (a-b)/a 化简a/b(a-b)-b/a(a-b)其中a=3 b=-2 (a+2b)(a-2b)+(a-b)(a+b)-2(a-3b)(a-b) 5(a*a*b-3*a*a*b)-2*(a*a*b-7*a*b*b) 化简：|a+b|+|b-a|+|2b| 化简 (a+b)²+2a(a-1/2b)-3(a-b)(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)除以a-2b/a +b 化简：{[(2a-b)/(a+b)]-[b/(a-b)]}÷[(a-2b)/(a+b)] (2a-3b)[(a+b)-b(a-3b)] 化简：a-[b-2a-(a-b)] 化简（2a-b/a+b-b/a-b）÷a-2a/a-b (2/3a)-[2/(a+b)]{[(a+b)/3a]-a-b}÷[(a-b)/b] (2/3a)-[2/(a+b)]{[(a+b)/3a]-a-b}÷[(a-b)/a] 化简|a|+|-b|-|a-b|-|a+b| 化简 |b|-|a|+|a-b|+|a+b| 化简 |a-b|+|a+b|-|a-b| -2a(a+b)+b(a+b)