$$\left. \begin{array} { l } { \frac { x - y } { x - 3 } - \frac { x ^ { 2 } - x + 2 } { x ^ { 2 } - 2 x - 3 } } \end{array} \right.$$
$\frac{-xy+2x-y-2}{\left(x-3\right)\left(x+1\right)}$
