\documentclass[12pt,english]{article} % important to have "article" if you only want to use \section{}
\usepackage[latin1]{inputenc} % allow to type accented characters
\usepackage{babel} % allow to use other languages
\usepackage{graphicx} % for graphics support
\usepackage{float} 
\usepackage{geometry}  % give some flexibility to format
\geometry{verbose,tmargin=0.75in,bmargin=0.75in,lmargin=1in,rmargin=1in} % needs the package geometry to work
\usepackage{amsmath} % some more option for math
\usepackage{fancyhdr} % give a nice heading for the document

\title{Latex tutorial}
\author{Damien}
\date{Today}

\pagestyle{fancy} % Works with the package fancyhdr

\newcommand{\be}{\begin{equation}} % I can give simplified version of the latex commands
\newcommand{\ee}{\end{equation}} % I can give simplified version of the latex commands


\begin{document} % the document starts here

\maketitle % put the title, the author and the date

\tableofcontents % make the table of contents (may need to compile 2 or 3 times)

\section{first section}
\subsection{second}
\subsubsection{third}
\paragraph{fourth}
\subparagraph{fith}

Here a reference from the bibliography \cite{ono}. If I want to include some math $x=\int_r^zdx$.

\begin{equation}
x=\int_r^zdx
\end{equation}

\be
x=\int_r^zdx
\ee

$$ x=\int_r^zdx $$

\begin{eqnarray}
x=\int_r^zdx \nonumber \\
y=\int_r^zdy 
\end{eqnarray}

\begin{figure}[h]   % you can try H, h, t, b, p
\begin{center}
\includegraphics[width=8cm]{tutorial.jpg} % include your own graph here
\includegraphics[width=8cm]{tutorial.jpg}
\caption{the first figure}\label{fig}
\end{center}
\end{figure}

\begin{equation}\label{one}
x=\int_r^zdx  \mbox{\hspace{3cm}} y=\int_r^zdy
\end{equation}

I can write in my text the equation \eqref{one} or talk about \ref{fig}. % \ref \cite \eqref may need more than 1 compilation

\begin{equation}
\Lambda
\end{equation}

\begin{table}
\caption{The caption are inside the table}
\begin{center}
\begin{tabular}{||| r |||| c ||| l |}
  \hline
  7C0 & hexadecimal \\
  3700 & octal \\ \cline{2-2}
  11111000000 & binary \\
  \hline \hline\hline\hline\hline
  1984 & decimal \\
  \hline
\end{tabular}
\end{center}
\end{table}

\begin{thebibliography}{1}

\bibitem{ono} T. Ono, H. Tanaka, H. Aruga Katori, F. Ishikawa, H. Mitamura, and T. Goto {\em Phys. Rev. B 67, 104431.}  2003.

\end{thebibliography}

\appendix

\section{the first appendix}

\end{document} % Close my document