I have 3 tabular environments for symbols, operators and abbreviations where each tabular environment gets to its own page. Also spacing between each row is too narrow and some mathematical signs actually cross each other such as the brackets below. And long sentences go over the page. 
I am using a [template CLS file](https://wiki.aalto.fi/download/attachments/69900685/aaltothesis.cls?version=1&modificationDate=1443108187586&api=v2) of my university that may interfere with something but try to answer as generally as possible.

Fig. 1 Contents of the page which looks too informal, Fig. 2 Example of Problem

[![enter image description here](https://i.stack.imgur.com/ZWY4nm.png)](https://i.stack.imgur.com/ZWY4n.png)
[![enter image description here](https://i.stack.imgur.com/T4ZYLm.png)](https://i.stack.imgur.com/T4ZYL.png)

How can you make Fig. 2's Math more LaTeX? How can you show Mathematical formulee in the page better in Fig. 1?

*MWE demonstrating the 3 sections for symbols, operators and abbreviations*

```
\documentclass[english]{article}
\usepackage{amsmath}

\section{Symbols and abbreviations}
%
\subsection*{Symbols}
%
\begin{tabular}{ll}
$\triangle$             &   triangle graph  oeuaua euaeouaoeuaoe uaoeu aoeu aou aoeu aoeu aoeu aou aou aoeu ae u        \\
$\triangle$             &   simplicial complex  aoeuauaou au au eaeu aoeu aoeu aoeu aoeu aoue auoe oeua au au           \\
$K[x_1,\ldots,x_n]$     &   polynomial ring                                         \\
$K[x_1,\ldots,x_n]/I$   &   quotient ring   \\
$\mathbb L^2$           &   lattice                             \\ 
$\mathcal R$            &   quotient ring f                 \\
\end{tabular}
%
\subsection*{Operators}
%
\begin{tabular}{ll}
$P\left[G(n;p)\models H\right]$     &   probability     \\
                            &   random graph                                                        \\
$P\left[\Lambda^s_p\models H\right]$    &   probability     \\
$P\left[G^s_p\models H\right]$      &   probability for the induced     \\
\end{tabular}
%
\subsection*{Abbreviations}
%
\begin{tabular}{ll}
cut                     &   cut-vertex set                                                          \\
DAG                     &   directed acyclic graph                  \\
digraph                 &   directed graph                                                          \\
network                 &   two-terminal graph                                                      \\
sp                      &   series-parallel                                                         \\
\end{tabular}

\end{document}

```