Perform the Operations and Simplify the Result When Possible $\frac { 5 x } { x ^ { 2 } + 11 x + 18 } + \frac { 5 x } { x ^ { 2 } - 4 }$

Perform the operations and simplify the result when possible. $\frac { 5 x } { x ^ { 2 } + 11 x + 18 } + \frac { 5 x } { x ^ { 2 } - 4 }$