Question

$$\frac{ y }{ (x+y)(x-y) } - \frac{ y }{ x(x+y) }$$

Evaluate

$\frac{y^{2}}{x\left(x^{2}-y^{2}\right)}$

Expand

$\frac{y^{2}}{x\left(x^{2}-y^{2}\right)}$