\[\frac{c - 2}{3 \cdot (c + 4)} + \frac{c^{\backslash 3}}{c + 4} =\]
\[= \frac{c - 2 + 3c}{3 \cdot (c + 4)} = \frac{4c - 2}{3 \cdot (c + 4)} =\]
\[= \frac{4c - 2}{3c + 12}\]