1\documentclass{article}
2
3\def\d{{\rm d}}
4\def\be{\begin{equation}}
5\def\ee{\end{equation}}
6\def\bc#1#2{#1 oder #2}
7\def\ac #1 #2{#1 und #2}
8\def\bea{\begin{eqnarray}}
9\def\eea{\end{eqnarray}}
10
11\newenvironment{mathegs}%
12{\medskip\footnotesize\begin{center}%
13\renewcommand{\arraystretch}{1.3}
14\begin{tabular}{ll}%
15\it \makebox[190pt][l]{Type} & \it To produce\\}
16{\end{tabular}\end{center}\medskip}
17
18\begin{document}
19
20\ac {abc} {bde}
21
22\bc {ace} {gda}
23
24\bea
25\nabla \times   \vec H &=& \vec J_c + {\partial \vec D \over \partial t} \label{M1} \\
26\nabla \times   \vec E &=&          - {\partial \vec B \over \partial t} \label{M2} \\
27\nabla \,\cdot\,\vec D &=& \varrho_e                         \label{M3} \\
28\nabla \,\cdot\,\vec B &=& 0                                 \label{M4}
29\eea
30
31this is another test
32\begin{mathegs}
33\verb@$a^2b^3$@ & $a^2b^3$\\
34\verb@$2^{21}$@ & $2^{21}$\\
35\verb@$2^21$@ & $2^21$\\
36\verb@$a^{x+1}$@ & $a^{x+1}$\\
37\verb@$a^{x^2+1}$@ & $a^{x^2+1}$\\
38\verb@$(x+1)^3$@ & $(x+1)^3$\\
39\verb@$\Gamma_{\alpha\beta\gamma}$@ & $\Gamma_{\alpha\beta\gamma}$\\
40\verb@${}_1A_2$@ & ${}_1A_2$\\
41\end{mathegs}
42
43
44\end{document}
45