For the function $f(x)$ given below, where $x>-3,$ evaluate $\underset{x}{lim}f(x).$

$f(x)=ln(2x+6)-ln(7x^2+3)$

If the function increases without bound, you should enter $.$ If the function decreases without bound $-.$ If the function does not approach a finite limit nor $+-$ as $x+-.$ you should enter DNE.

Provide your answer below:

$\underset{x}{lim}f(x)=$