TeX Quellcode:

\begin{array}{rclcl} \mathbb{D} &=& \mathbb{R} \cr\cr 2 \cdot 10^{2x}-16 \cdot 10^x+30 &=& 0 &\vert& \text{3. Potenzgesetz} \cr 2 \cdot \left(10^x \right)^2 -16 \cdot 10^x+30 &=& 0 \end{array}