[(2X+y)-y(y+4X)-8X]÷2x

[(x+y)(x-y)-(x-y)²+2y(x-y)]÷4y 4x-3y/x-2y÷6y-8x/y-2x 计算：(x-y)^8÷(y-x)^4×(x-y) 【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x² [2(x-y)^5-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2[2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2 [(2X+y)-y(y+4X)-8X]÷2x 化简【(x²+y²)-(x-y)²+2y(x-y)】÷4y 化简(2x/(x+y)-4x/(y-x))/8x(x^2-y^2)得 化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x [(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y [4y(2x-y)-2x(2x-y)]÷(2x-y) [4y（2x-y)-2x(2x-y)]÷（2x-y)怎么做 18(x+y)^8(x-y)^7÷[3(x+y)^3(x-y)^3]^2 计算：[（x+y）³-2(x+y)²-4(x+y)]÷（x+y) 计算[(x+y)的立方-2(x+y)的平方-4(x+y)]÷(-x-y) 81/8*(-x-y)^6*(x-y)^3*4/9(x+y)^4*(y-x)^2 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2