La figura 7 se logró con el entorno:

\begin{figure}[h] \centering

\begin{tabular}{cccc}

\fbox{\includegraphics[width=3cm,height=3cm]{c:/enrique/figuras/inaoe1.jpg}}&

\fbox{\includegraphics[width=3cm,height=3cm]{c:/enrique/figuras/inaoe2.jpg}}&

\fbox{\includegraphics[width=3cm,height=3cm]{c:/enrique/figuras/inaoe3.jpg}}&

\fbox{\includegraphics[width=3cm,height=3cm]{c:/enrique/figuras/inaoe4.jpg}}

\end{tabular}

\caption[Logotipos de INAOE]{\small{Diversos logotipos del INAOE}}

\label{inaoes}

\end{figure}