5ab^2-{2a^2b-[3ab^2-(4ab^2-2a^2b]}化简

a^2b-ab+2ab^2-5a^b-4ab+3ab^2化简快 -ab(a^2b^5-ab^3-b) a^2-3ab+b^2/ab=( )/ab-3 a^2-3ab+b^2/ab=( )/ab -3 合并同类项5a²b-3ab-4ab²+7ab-2ab² 5ab^2-{2a^b-[3ab^2-(4ab^2-2a^2b)]} 2ab(5ab^2+3a^2b)急要 -5a^2b^3+20ab^2-5ab 因式分解：(ab^2)^2×(-a^3b)^3×(-5ab) 2ab*(5ab²+3a²b) a+b/2ab 2AB/A+B a+b/2ab 已知ab^2=-2,求-ab(a^2b^5-ab^3-b)的值 化简求值-ab*(a^2b^5-ab^3-b),其中ab^2=-2 -ab(a^2b^5-ab^3-b),其中ab^2=-2 计算：2ab[(2ab)²-3b(ab+a²b)-ab²] ab^2=一3,则-ab(a^2乘b^5-ab^3-b)=?