计算:8x^2y^4(-3x/4y^2)/(-x^2y/2)
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:1/(x-y)-1/(x+y)-2y/(x^2+y^2)-4y^3/(x^4+y^4)-8x^7/(x^8+y^8
计算【3(x-y)^2(x+y)^-2/4(x+y)^2(x-y)^-2】^-2
计算(2x-3y)(x+4y)-(3x+y)(x-2y)
(x-3y)(y+2x)-(4y-3x)(3x+4y)计算
计算:[(2x - 3y)^2 - (x-y)(4x+2y)] / 2y
计算:(-x-2y) * (3x-y)
计算:8x^2y^4(-3x/4y^2)/(-x^2y/2)
计算(x+y)(x+y)^2(-x-y)^3
计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x
计算(x-2y)^2-4(2x+y)(y-2x)+4x(y-2)
计算(4x^2y-9y)/(2x+3)