-2x(3x-7y)+(x-y)(x^2+xy+y^2) 计算
(x^2+xy/x-y)/(xy/x-y)计算
计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2)
计算:3xy[2xy-x(y-2)+x]
计算4xy+(x-2y)的平方+(x+3y)(3y-x)
计算:(x+y/x-y)÷(xy+x^2)
计算:(-7x²y)(2x²y-3xy³+xy)
x-y/xy-y^2计算
计算:(x^2-y^2/xy)^2/(x+y)^2*(x/x-y)^3
计算3x[xy-2x(1/y-x/3]+3y(x²-y²)
1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y)
计算3xy[2xy-x(y-2)+x-1]
计算:[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y