作业帮化简：(x^4+x^3y-xy^3-y^4)/(x^4-x^3y+x^2y^2+xy^3-2y^4)
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化简：(x^4+x^3y-xy^3-y^4)/(x^4-x^3y+x^2y^2+xy^3-2y^4)
化简：(x^4+x^3y-xy^3-y^4)/(x^4-x^3y+x^2y^2+xy^3-2y^4)
化简：(x^4+x^3y-xy^3-y^4)/(x^4-x^3y+x^2y^2+xy^3-2y^4)
分子=(x+y)(x-y)(x^2+xy+y^2)
分母=(x-y)(x+y)(x^2-xy+2y^2)
所以化简后为(x^2+xy+y^2)/(x^2-xy+2y^2)
化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy]
化简2(x²y+xy)-3(x²y-xy)-4x²y
化简3（x²y+xy)-4(x²y-xy)-5x²y,
因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y)
-x-3xy+y
化简：2x²y+{2xy-[3x²y-2(-3x²y+2xy)]-4xy}化简：2x²y+{2xy-[3x²y-2(-3x²y+2xy)]-4xy}
化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6
【x(xy-xy)-y(x-xy)】÷3xy
化简：(x^4+x^3y-xy^3-y^4)/(x^4-x^3y+x^2y^2+xy^3-2y^4)
5x^2y-3xy^2+4xy-14xy^2+4xy-2x^2y（化简）
已知x+y=4,x-y=6,化简xy（y²+y）-y²（xy+2x）-3xy
化简:-3{y-(3x^2-3xy)}-{y+2(4x^2-4xy)}版本
化简4xy-3y²-3x²+xy-3xy-2x²+x²-2y²
（-3x^y+2xy)-( )=4x^+xy
分解因式 x(x-y)^5+xy(y-x)^4-x^3(x-y)3
x/3=y/4,求(x*x-xy)/(x*x+y*y)的值
x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x²