\documentclass{article}

\usepackage{graphicx}
\usepackage{amssymb}
\usepackage{stmaryrd}
\usepackage{amsmath}
\usepackage{fancyvrb}
\title{}
\author{}

\date{}
\begin{document}
\maketitle


\thispagestyle{empty}

\[
\begin{array}{@{\hspace{5pt}}l}
\forall 
\hspace*{5pt}
\mbox{\em frame}
^{
\mathsf{Keep}
}
\hspace*{5pt}
{\scriptscriptstyle \in}
\hspace*{5pt}
\mathtt{getAllFrames}
\left(
\mathtt{fnDB}
\right)
\hspace*{5pt}
\bullet 
\\
\begin{array}{@{\hspace{5pt}}l}
\forall 
\hspace*{5pt}
\mbox{\em frame}_{\mbox{\scriptsize\em def}}
^{
\mathsf{Keep}
}
\hspace*{5pt}
{\scriptscriptstyle \in}
\hspace*{5pt}
\left[
\begin{array}{@{\hspace{1pt}}l@{\hspace{1pt}}}
\mathtt{getFrameXMLDef}
\left(
\mathtt{fnDB}
,
\mbox{\em frame}
\right)
\\
\end{array}
\right]
\hspace*{5pt}
\bullet 
\\
\begin{array}{@{\hspace{5pt}}l}
\forall 
\hspace*{5pt}
\mbox{\em targets}_{\mbox{\scriptsize\em ref}}
^{
\mathsf{Keep}
}
\hspace*{5pt}
{\scriptscriptstyle \in}
\hspace*{5pt}
\begin{array}{@{\hspace{1pt}}l@{\hspace{1pt}}}
\mathtt{refTargets}
\left(
\mbox{\em frame}_{\mbox{\scriptsize\em def}}
\right)
\cup 
\\
\mathtt{concatMap}
\left(
\begin{array}{@{\hspace{1pt}}l@{\hspace{1pt}}}
\mathtt{refTargets}
,
\\
\mathtt{examples}
\left(
\begin{array}{@{\hspace{1pt}}l@{\hspace{1pt}}}
\mbox{\em frame}_{\mbox{\scriptsize\em def}}
\\
\end{array}
\right)
\\
\end{array}
\right)
\\
\end{array}
\hspace*{5pt}
\bullet 
\\
\begin{array}{@{\hspace{5pt}}l}
\forall 
\hspace*{5pt}
\mbox{\em target}_{\mbox{\scriptsize\em ref}}
^{
\mathsf{Keep}
}
\hspace*{5pt}
{\scriptscriptstyle \in}
\hspace*{5pt}
\mathtt{wordsS}
\left(
\mbox{\em targets}_{\mbox{\scriptsize\em ref}}
\right)
\hspace*{5pt}
\bullet 
\\
\begin{array}{@{\hspace{5pt}}l}
\exists 
\hspace*{5pt}
\mbox{\em frame}_{\mbox{\scriptsize\em target}}
^{
\mathsf{Add}
}
\hspace*{5pt}
{\scriptscriptstyle \in}
\hspace*{5pt}
\mathtt{getWordFrames}
\left(
\begin{array}{@{\hspace{1pt}}l@{\hspace{1pt}}}
\mathtt{fnDB}
,
\\
\mbox{\em target}_{\mbox{\scriptsize\em ref}}
\\
\end{array}
\right)
\hspace*{5pt}
\bullet 
\\
\begin{array}{@{\hspace{1pt}}l@{\hspace{1pt}}}
\mbox{\em frame}
= 
\hspace*{2pt}
\mbox{\em frame}_{\mbox{\scriptsize\em target}}
\\
\left\{
\begin{array}{@{\hspace{1pt}}l@{\hspace{1pt}}}
\left\{
\begin{array}{@{\hspace{1pt}}l@{\hspace{1pt}}}
\mathtt{F}
: 
\hspace*{3pt}
\hspace*{3pt}
\mbox{\em frame}_{\mbox{\scriptsize\em target}}
\hspace*{3pt}
\rightsquigarrow 
\hspace*{3pt}
\mbox{\em frame}
\hspace*{3pt}
3
\\
\end{array}
\right\}
\\
\end{array}
\right\}
\\
\end{array}
\\
\end{array}
\\
\end{array}
\\
\end{array}
\\
\end{array}
\\
\end{array}
\]
\end{document}
