In $\triangle \mathrm{PQR}, \angle \mathrm{Q}=90^{\circ}$. If $\tan \mathrm{R}=\frac{1}{3}$, then what is the value of $\frac{\sec P(\cos R+\sin P)}{{cosec} R(\sin R-{cosec} P)}$ ?

$\frac{18}{7}$ $-\frac{18}{7}$ $-\frac{2}{7}$ $\frac{2}{7}$

$-\frac{18}{7}$