(a+2b)^2(a-2b)^2-(2a+b）^2（2a-b）^2 化简

-2a(a+b)+b(a+b) (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-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] -a-b+2b^2/a+b (2/3a)-[2/(a+b)]{[(a+b)/3a]-a-b}÷[(a-b)/a] 化简:[2/3a - 2/(a+b) * (a+b/3a - a - b)] / (a-b)/a (a/a-b-a/a+b)(a+b)(a-b)/2b (b-a)*(b-a)+(b-a)*2*a等于多少? 化简：|a+b|+|b-a|+|2b| |a+b|-|b-a|+|2b|化简哦! a-b+2b²/a+b 通分a-b,2b^/a+b 化简(2a-b/a+b-b/a-b)除以a-2b/a+b 计算：((a+b)(a-b)-(a-b)^2+2b(a-b))/4(a-b) 化简(2a-b/a+b-b/a-b)除以a-2b/a +b