TeX Quellcode:

\begin{array}{rclll}u_1 = x^2 &\neq& 2 &\vert& \pm\sqrt{} \\x_{1,2} &\neq& \pm\sqrt{2}\\\\u_2 = x &\neq& -4 &\vert& \pm\sqrt{}\\x_{3,4} &\neq& \pm\sqrt{-4}\end{array}