3a^-2b*2ab^-2

(a-b)^3+2ab(a-b) ab/a+b=3 a-2ab+b/2a-3ab+2b? a^2-3ab+b^2/ab=( )/ab-3 a^2-3ab+b^2/ab=( )/ab -3 a^2b-ab+2ab^2-5a^b-4ab+3ab^2化简快 a+b/2ab 2AB/A+B a+b/2ab ab^3+b^2+b-a+1 -ab(a^2b^5-ab^3-b) 3(-ab+2a)-(3a-b) 3(-ab+2a)-(3a-b) (ab(a^-2ab)-a^2b(a-3b))÷（3a^b） 3(-2ab+3a)-(2a-b)+6ab 3(-ab+2a)-(3a-b)+2ab 化简:(-2ab+3a)-(2a-b)+6ab 3（-ab+2a)-(3a-b）+3ab 计算：2ab[(2ab)²-3b(ab+a²b)-ab²]