(3x^2/4y)^2*2y/2x+(x^2/2y)^2/2y^2/x

1、x(x-y)(x+y)-x(x+y)^2 (x+3y-4)(2x-y) x^2-y^2/x+y-4x(x-y)+y^2/2x-y, 化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方 【x-3y][x+y]-[x-2y][x +2y]-[x-y [(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y) x/x-y*y^2/x+y-x^3y2/x^4-y^4/x^2/x^2+y^2 有这样一道题:"计算(2*x*x*x-3*x*x*y-2*x*y*y)-(x*x*x-2*x*y*y+y*y*y)+【- (1)(x^2/x)-y-x-y (2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y) 【(x-y)^2+(x+y)(x-y)】除以 2x (2x-y)^2-4(x-y)(x+2y)