TeX Quellcode:

\begin{array}{rclcl}\mathbb{D} &=& \mathbb{R} \cr \cr 66^y &=& 1 & \vert & \ln() \cr \ln(66^y) &=& \ln(1) &\vert& \text{3. Logarithmengesetz} \cr y \cdot \ln(66) &=& 0 & \vert & :\ln(66) \cr y &=& 0 \cr \cr \mathbb{L} &=& \left\{0\right\}\end{array}