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%%  Ein Beispiel der DANTE-Edition
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%%  2. Auflage
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%%  Beispiel 06-03-113 auf Seite 282.
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%%  Copyright (C) 2016 Herbert Voss
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%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
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%%  See http://www.latex-project.org/lppl.txt for details.
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% Show page(s) 1
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\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{193.16928pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands

%StopShownPreambleCommands
\begin{document}
\begin{tabular}{|*7{c|}}\hline
a1&b1&c1&d1&e1&f1&g1\\\hline
a2&\multicolumn{2}{l|}{b2}
  &d2&e2&f2&g2\\\hline
\multicolumn{3}{|l|}{a3}&d3&
\multicolumn{2}{l|}{e3}&g3\\\hline
\end{tabular}
\end{document}