\documentclass{article}

\begin{document}

This document contains all sorts of layouts we are supposed to
support, along with weird nestings.


A normal paragraph

Another one 
\begin{equation} 
x = \sin y 
\end{equation} 
with maths inside

\begin{quote}
An environment...

... with two paragraphs
\end{quote}

\begin{foo}
an unknown environment
\end{foo}


\section{A section}

\section[Hello!]{A section with optional argument}

\begin{quote}
An environment
\end{quote}

\section*{A starred section}

\begin{figure}
\caption{A figure}
\end{figure}

A paragraph\footnote{hello} with a footnote and another
one\footnote{hello 

there} with several paragraphs

some ERT \vspace{1cm} aa

and another paragraph

\begin{center}
Some centered stuff (does not work)
\end{center}

\begin{quotation}
An environment

\section*{with a command inside it}
\end{quotation}

\begin{quotation}
An environment

\begin{quotation}
and the one inside it

actually with several paragraphs
\end{quotation}

\end{quotation}

We can also nest enumerations (does not work quite yet)

\begin{enumerate}
\item Item1
\begin{enumerate}
\item Item1.a
\item Item1.b
\end{enumerate}
\begin{itemize}
\item Item1.*
\item Item1.*
\end{itemize}
\item Item2
\end{enumerate}

\end{document}