TeX Quellcode:

\begin{array}{rclll}-3z^3+81-3i &=& 84 & \vert & -81+3i \\-3z^3 &=& 3+3i &\vert & :(-3)\\z^3 &=& -1-i &\vert& \sqrt[3]{} \\z &=& \sqrt[3]{-1-i}\end{array}