Evaluate the integral.
$\displaystyle \int \frac{13 x^2 - 10 x - 3 } {(x - 3)(x + 1)(2 x + 1)} \,dx =$ $+ C$.
Note: You may need to use absolute value in your answer, since $\int \frac{1}{x} \, dx = \ln| x| + C$