化简:【(2x-y)(2x+y)+y(y+6x)】÷2x

化简:【(2x-y)(2x+y)+y(y+6x)】÷2x 化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y) [(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y 化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方 1、x(x-y)(x+y)-x(x+y)^2 [x(x-y)-y(x-y)+(x+y)(x-y)]÷2x其中x=2012 y=2013 计算：(x-y)^7÷(y-x)^6+(-x-y)^3÷(x+y)^2 1.[(x-y)^2-2(y -x)]÷(x-y) 化简：（2x-y)²-4(x-y)(x+y) 计算:(x-y)^2*(y-x)^2*(x-y)^6 6(x+y)2-2(x-y)(x+y)因式分解 (1)(x^2/x)-y-x-y