计算(3a^2b-7ab^2-a^2b^2)`5ab
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
a^2b-ab+2ab^2-5a^b-4ab+3ab^2化简快
计算 (-2ab)^3(5a^2b-1/2ab^2+1/4b^3)
a+b/2ab
2AB/A+B
计算:[(a+b)^2-4ab][(a-b)^2+4ab]-(a^2-b^2)^2
计算:(a^2+3ab+b^2)(a^2-3ab+b^2)=
计算:a2-2ab/-ab+b2÷(a2/a-b÷2ab/2b-a)
计算(3a-2b)(9a*a+6ab+4b*b)-(3a+2b)(9a*a-6ab+4b*b)
计算(a^3-4a^2b-a+4ab^2)/a(a-2b+1)
计算:(-a^2b)^3-(a^3)^2b^3+(-a)^4*(ab)^2*(-2b)