\documentclass{amsart}
\usepackage{amsmath, amssymb, graphicx}

\begin{document}

This is a simple math equation: $3+5 = 8$. Let me try to put this
equation in the center of the line. $$3+5=8$$

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$\lim_{x \to 2} 4x = 8$. This is not a good format, so lets change
it to $\displaystyle \lim_{x \to 2} 4x = 8$

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\begin{itemize}
  \item I am having fun
  \item Its raining outside
\end{itemize}

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\begin{equation}
3+5=8
\end{equation}

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\begin{align}
3x+5x&=8x \nonumber \\
4y+6y&=10y
\end{align}

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Let us try writing a matrix:
$\left[
\begin{array}{lrc}
1 & 2 & 3 \\
4 & 5 & 6 \\
7 & 8 & 9 \\
2 & 3 & 4
\end{array}
\right]$

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Let us try inserting a picture here now. Note that picture should
be in .ps or .eps format.
\begin{figure}[h]
\includegraphics[width=4in]{f1}
\caption{isn't this cool?}
\end{figure}

%------------------------------------------------------------------


\end{document}
