\documentclass{article}
\usepackage{amsmath} % pkg required by EasyLatex
\usepackage{amsfonts} % pkg required by EasyLatex
\usepackage{amssymb} % pkg required by EasyLatex
\usepackage{psfrag} % pkg required by EasyLatex
\usepackage[dvips]{graphicx} % pkg required by EasyLatex

\begin{document}

\section*{ main section 1 }
hello

\begin{align*}
3 + 2 = 5
\end{align*}
\subsection*{ subsection 1 }
hi

\begin{align*}
2 + 9 = 7
\end{align*}
\subsubsection*{ subsubsection 1 }
bye

\begin{align*}
1 + 3 = 44
\end{align*}
\subsection*{ subsection 2 }
number 2 is my name

\section*{ mainSec 2 }
goodbye: $22 + 4 = 9$

\end{document}
