[x(x^2y^2-xy)-y(x^2-x^3y)]/(2x^2y)
[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y
因式分解:x×x-xy-2y×y-x-y
(x+y)(x-y)-(2xy+3y)平方
化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y)
(x^2+xy/x-y)/(xy/x-y)计算
作乘法:(x+y)(x^2-xy+y^2);(x-y)(x^2+xy+y^2)
2xy/(x+y)(x+y)与x/(x+y)(x-y)怎么通分
x根号x+x根号y/xy-y^2)-(x+根号xy+y/x根号x-y根号)y
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)
(xy-x^2)乘以(xy)/(x-y)
急![(3x+y)²-3(3x-y)(x+y)-(x-3y)(x+3y)]÷(2xy)