-4a^3+16a^2b-26ab^2

-4a^3+16a^2b-26ab^2 a^2b-ab+2ab^2-5a^b-4ab+3ab^2化简快 16a^2b-16a^3-4ab^2 (a-b)^3+2ab(a-b) 1/4a^2b^2{3ab(a+b)-5a(ab-b^2)}=? (a-b)(a^5+a^4b+a^3b^2+ab^4+b^5)bggg -4a^3b+6a^2b-2ab -2ab(3a^2-2ab-4b^2) (2b-a)b-（2a-b）a-2ab(3a^2-2ab-4b^2)(2b-a)b-（2a-b）a 5ab^2-{2a^b-[3ab^2-(4ab^2-2a^2b)]} 化简[(a-b)/(a+2b)]/[(a^2-b^2)/(a^2+4ab+b^2)]-(3a^2-4ab)/(a^2+ab) 求化简 (a-b)/(a+2b)除以(a^2-b^2)/(a^2+4ab+b^2)-(3a^2-4ab)/(a^2+ab) 计算(a^3-4a^2b-a+4ab^2)/a(a-2b+1) {ab-[3a²b-(4a²b+1/2ab)]-4a²b}+3a²b 2a²b(a-b)+ab(a-b)²+4ab²(a-b) 计算2A(A^2 -AB+B^2)-3AB(4A-2B) -3/4ab+2/3a^2b+ab-a^2b-1/2ab-5/3a^2b 证明（a^2+ab+b^2)^2+4ab(a+b)^2=(a^2+3ab+b^2) 证明（a^2+ab+b^2)^2+4ab(a+b)^2=(a^2+3ab+b^2)