-1/2ab^2(b^2+3ab^2)计算
计算 (-2ab)^3(5a^2b-1/2ab^2+1/4b^3)
计算5a^2b÷(-3分之1ab)×2ab^2
计算:2/3a²-1/2ab+3/4a²+ab-b²
计算(—3ab)(2a²—1/3ab+5b²)
计算ab/(a+b-1)(a+b)+ab/(a+b)(a+b+1)+ab/(a+b+1)(a+b+2)+.+ab/(a+
计算:[(ab).(a^2b^2)]^2
计算 (a^2b-ab-a+1)/(ab^2+3ab-b-3)÷(a^2+a_2)/(b^2+b-6)
先化简,在计算 ab-{2ab-2[3a^b-(4ab^+0.5ab)-6a^b]}-3ab^其中
计算:a2-2ab/-ab+b2÷(a2/a-b÷2ab/2b-a)
计算:(a^2+3ab+b^2)(a^2-3ab+b^2)=
计算:(2ab+3b²-5)-(3ab+3b²-8)
计算:-10ab(3/2ab²-1/5a²b);(-2a)²(3ab²-5ab&