Помогите упростить! х+y/4х(х-у) вычесть х-у/4х(х+у)

[latex]displaystyle frac{x+y}{4x(x-y)}- frac{x-y}{4x(x+y)}= frac{(x+y)^{2}-(x-y)^{2} }{4x(x-y)(x+y)}= \ \ = frac{(x+y+x-y)(x+y-x+y)}{4x(x-y)(x+y)}= \ \ = frac{4xy}{4x(x-y)(x+y)}= frac{y}{ x^{2}- y^{2} }; [/latex]