\documentclass{article}

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

\date{}
\begin{document}
\maketitle


\thispagestyle{empty}

Do not check the document macros.tex\\effective: True

\[
\left\{
\mathtt{dId}
\left(
\mbox{\em doc}
\right)
= 
\hspace*{2pt}
\mathsf{macros.tex}
\right\}
\]
\end{document}
