Помогите упростить выражение!(x+y)^2/x^2+xy+(x-y)^2/x^2-xy+7

[latex] \frac{(x+y)^2}{x^2} + xy + \frac{(x-y)^2}{x^2} - xy + 7 = \frac{(x+y)^2}{x^2} + \frac{(x-y)^2}{x^2} + 7 = \frac{(x+y)^2 + (x-y)^2}{x^2} + 7 = \frac{x^2 + 2xy + y^2 + x^2- 2xy + y^2}{x^2} + 7 = \frac{2x^2 + 2y^2}{x^2} + 7 = \frac{2x^2 + 2y^2 + 7x^2}{x^2} = \frac{9x^2 + 2y^2}{x^2} = \frac{9x^2}{x^2} + \frac{2y^2}{x^2} = 9 + \frac{2y^2}{x^2}[/latex]