Integration Rules/Lists of Integrals

Exponential function:
* \int a^u dx: no general rule. Maybe helpful: \int a^{b+kx} dx = \frac{1}{k} \frac{a^{b+kx}}{ln(a)}
* \int a^x dx = \frac{a^x}{\ln(a)} + C
* \int \mathrm{e}^u dx: no general rule. Maybe helpful: \int e^{b+kx} dx = \frac{1}{k} e^{b+kx}
* \int \mathrm{e}^x dx = \mathrm{e}^x + C