(a-b)^5÷(b-a)^2

(a-b)^5÷(b-a)^2 5(a*a*b-3*a*a*b)-2*(a*a*b-7*a*b*b) a(a-1)-(a×a-b)=-5,求(a×a+b×b)÷2-ab 化简：{[(2a-b)/(a+b)]-[b/(a-b)]}÷[(a-2b)/(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] 计算(a-b)^m(a-b)[2(b-a)]^3[(b-a)^5]^2÷(a-b)^m= (2/3a)-[2/(a+b)]{[(a+b)/3a]-a-b}÷[(a-b)/a] 2(a+b)-[4(a+b)-3(a+b)]一[5(a-b)+(a-b)]过程 [（a+2b)(a-2b)-(2a-b)²+(3a-b)(3a-5b)]÷2a其中 a=-1,b=2 [(-a-3b)(-a+3b)-(-3b+a)^2]÷(-6／5a) 计算(5a-3b)^2+(a+b)(a-b) 2a+b/3a+5b 求a/b (a-b)^n(b-a)^2n(a-b)^5 -2a(a+b)+b(a+b) 5(2a+b)^4÷(2A+b)^2 (a-b)（a^2+b^2)(a^4+b^4）（a+b)要有计算过程 (a-b/a+b)^3÷(a-b)^2/a+b乘(-a+b/a-b)^2 [(a²+b²)/(a²-b²)-(a-b)/(a+b)]÷2ab/[(a-b)(a+b)³]