TeX Quellcode:

\begin{array}{rcl} \mathbb{L} &=& \mathbb{L}_{1.1} \cup \mathbb{L}_{1.2} \cup \mathbb{L}_{2.1} \cup \mathbb{L}_{2.2} \cr &=& \left]\dfrac{3}{5};3\right[ \cup \emptyset \cup \left]-\infty;-3\right[\ \cup \emptyset \cr &=& \left]-\infty;-3\right[\ \cup \left]\dfrac{3}{5};3\right[ \end{array}