\documentclass[10pt,envcountsect]{beamer}

\mode<presentation> {
  \usetheme{Warsaw}
}

\usepackage[english]{babel}
\usepackage[latin1]{inputenc}
\usepackage{times}
\usepackage[T1]{fontenc}
\usepackage{pstricks}
\usepackage{multicol}
\usepackage{pstricks,pstricks-add,pst-math,pst-xkey}
\usepackage[vlined]{algorithm2e}
% 
% \newcommand{\incmargin}{\IncMargin}
% \newcommand{\decmargin}{\DecMargin}
% \newcommand{\SetLine}{\SetAlgoLined}


\begin{document}
%pour afficher le plan au début de chaque section
\AtBeginSection[]
{
  \begin{frame}<beamer>
    \frametitle{Plan}
    \tableofcontents[currentsection,currentsubsection]
  \end{frame}
}

%pour afficher le plan au début de chaque sous-section
\AtBeginSubsection[]
{
  \begin{frame}<beamer>
    \frametitle{Plan}
    \tableofcontents[currentsection,currentsubsection]
  \end{frame}
}


\title{Episode 02 -- Using a calculator}
\subtitle{European section -- season 1}
\date{}


\begin{frame}
  \titlepage
\end{frame}

\Large
\begin{frame}
$$2+3-4\times5+\dfrac{6}{7}$$\pause
Two plus three minus four times five plus six over seven \pause
$$3^4\times3^6=3^{10}$$\pause
Three to the power four times three to the power six is equal to three power ten. \pause
$$5^2  ;  \sqrt{3} ; 7^3$$ \pause
five squared ; square root of three ; seven cubed
\end{frame}



\end{document}
