$$\frac{ 5 }{ x+y } - \frac{ 2 }{ x-y } -1, \frac{ 15 }{ x+y } + \frac{ 7 }{ x-y } 10$$
$\frac{-x^{2}+3x+y^{2}-7y}{x^{2}-y^{2}},\frac{5\left(17x+11y\right)}{x^{2}-y^{2}}$
