\documentstyle [12pt]{jarticle}
\title{ \LaTeX DEMONSTRATION}
\author{Chris}
\date{today}
\begin{document}
\maketitle
\section{intro}
This is a file latex1.tex
\section{what is Latex}
\begin{itemize}
\item For laters and Mathematical formulas\\
The great advantage you can get from Latex is its ability to\\
to very well write letters together with mathematical equations.
\item Creation of tables\\
First create the tabular environment \\ \\
\begin{tabular}{|rl|c|r|} \hline
Continent& & mountain's name & height(m) \\ \hline \hline
アジア &Asia &Everest&8848\\ \hline
アフリカ &Africa &Kilimanjaro&5895\\ \hline
南アメリカ &South America &Anconcagua&6959 \\ \hline
ヨーロッパ &Europa &Mont Blanc&4807\\ \hline
オセアニア &South Pole&Vinson Masif&5140\\ \hline
\end{tabular}
\end{itemize}
\section{Maths Equation}
This is a very Important part of Latex.\\
Like this
$\sum_{i=1}^{n}i^2=\frac{1}{6}n(n+1)(2n+1)$
The formula can written inside a sentense.\\
Or outside the sentense like below,
$$\sum_{i=1}^{n}i^2=\frac{1}{6}n(n+1)(2n+1)$$
\end{document}