TeX Quellcode:
\begin{array}{rcl}\quad\mathbb{D}&=&\mathbb{R}^+ \cr \cr f(x)&=&\ln(x)+7^x+\sin(x)+5 \cr\cr\cr f'(x)&=&\dfrac{1}{x}+7^x\cdot\ln\left(7\right)+\cos(x)\end{array}