tlng diJwb ya kaaa plisss tlbg dijwb

[tex] \frac{5m}{m^{2} - n^{2} } - \frac{3}{m + n} \\ \\ = \frac{5m}{(m+n) (m-n)} - \frac{3 (m-n)}{(m + n)(m-n)} \\ \\ = \frac{5m - 3m + 3n}{m^{2} - n^{2}} \\ \\ = \frac{-2m + 3n}{m^{2} - n^{2}} [/tex]