Integrate the rational functions $\frac{1}{x^2-9}$

Question

$\begin{array}{1 1}\large \frac{1}{6} \log|x-3|-\large \frac{1}{6} \log|x+3| + c \\ \frac{1}{6} \log|x-3|+ \frac{1}{6} \log|x+3| + c \\ \frac{1}{6} \log|x+3|-\large \frac{1}{3} \log|x-3| + c \\ \frac{1}{6} \log|x+3|- \frac{1}{6} \log|x+3| + c \end{array} $