约分x^2-3xy+2y^2/-4x^2y^2+x^3y+4xy^3
x^2y+xy^2/xy^3-x^3y约分
(-3x^y+2xy)-( )=4x^+xy
约分(x^3-2x^2y)/(x^2y-2xy^2)
x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2
已知x-y=4xy,则2x+3xy-2yx-2xy-y
初二分式约分3x-4y/8xy-6x^2
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)
约分:(x²-4)/(xy+2y)
[-(x-y)^2/xy]^-4*(y^2-xy/x)^3*(x^4/y^10)÷(xy-y^2/x)^-5=-y(y-
(2x²y-3xy²)-3(x²y-2xy²)+2(x²y-4xy
已知x-y=4xy,求x-2xy-y分之2x+3xy-2y的值!
xy=-2,x+y=3,求代数式(4xy+12y)+[7x-(3xy+4y-x)]