2x^2y×(-8y^2)+4x^2y×5y^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(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2)
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
2x^2y×(-8y^2)+4x^2y×5y^2
2(x-y)+3(x+y)2-5(x-y)-8(x+y)2-(x-y)
1) (2x+5y)(2x-5y)(-4x^2-25y^2) 2) [(x+y)(x-y)-(x-y)^2+2y(x-y
{(z+y)(x-y)-(x-y)的2次方+2y(x-y)}除以4y
x^2-y^2/x+y-4x(x-y)+y^2/2x-y,
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai
x+2y+4y^2/x-y+4x^y/4y^2-x^2
(x+2)(x+3) (x-4)(x+1) (y+4)(y-2) (y-5)(y-3)
5(x-y)^2-(x-y)-8(x-y)^2-3(x-y)