Indefinite Integration

If \(\int x^5 e^{-4 x^3} \mathrm{~d} x=\frac{1}{48} \mathrm{e}^{-4 x^3} \mathrm{f}(x)+\mathrm{c}\), where \(\mathrm{c}\) is a constant of integration, then \(\mathrm{f}(x)\) is given by