3(x^4)^3-2(xy)^4x^8y+5(x^3y^2)x^6y
3(x^4)^3-2(xy)^4x^8y+5(x^3y^2)x^6y
已知x^2y等于3,求2xy(x^5y^2-3x^3y-4x)
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
化简:5根号X^3Y-2Y根号XY-6根号XY+根号X分之Y+根号Y分之X
已知(x+2)^2+|x+y+5|=0,求3x^2y-[2x^2y-(2xy-x^2y)-4x^2]-xy
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)
化简.x^2-3xy/x^2-6xy+9y^2
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
计算4xy+(x-2y)的平方+(x+3y)(3y-x)
已知X+Y=6,XY=-4,求(5X-4Y-3XY)-(8X-Y+2XY)的值
已知;x+y=4,x-y的绝对值=6,求xy(y的平方+y)-y的平方(xy+2x)-3xy
3x²y+xy²-[2xy²-4x²y+(x²y-2xy²)