3a^2b-{2ab^2+2/3[5a^3-1/2(-6a^2b+4a^3)+6a^2b]}

(a-b)^3+2ab(a-b) a^2b-ab+2ab^2-5a^b-4ab+3ab^2化简快 化简：1.3a+2b-5a-b 2.3(-ab+2a)-2(3a-ab) 已知a*a-ab=3,ab+b*b=-5,求代数式a*a+b*b与a*a-2ab-b*b的值 1/4a^2b^2{3ab(a+b)-5a(ab-b^2)}=? -ab(a^2b^5-ab^3-b) (a-b)(a^5+a^4b+a^3b^2+ab^4+b^5)bggg ab/a+b=3 a-2ab+b/2a-3ab+2b? 3(-ab+2a)-(3a-b) 3(-ab+2a)-(3a-b) 5ab^2-{2a^b-[3ab^2-(4ab^2-2a^2b)]} 6a-5b+2ab+5b-3a (ab(a^-2ab)-a^2b(a-3b))÷（3a^b） -2ab乘以(-a^+6a^b-3a+b) 18ab(a-b)^2-12a(b-a)^3 已知a,b满足a+b=5,a-b=1,求ab,a^2+b^2-3ab a^3-ab^2 =a （a^2 -b^2) =a(a+b)(a-b) -3/4ab+2/3a^2b+ab-a^2b-1/2ab-5/3a^2b