\documentclass[11pt]{article} \usepackage{amssymb,amsmath,amscd,concmath} % we can define whatever comments we would like to use for consistency. % of course we have to somewhere list this special commands (may be we can use % a pop up with editiing help or somkething similar \newcommand{\rs}{\ensuremath{\gg}} %right shift >> \newcommand{\ls}{\ensuremath{\ll}} %left shift << \newcommand{\rr}{\ensuremath{\ggg}} %right rotate >>> \newcommand{\lr}{\ensuremath{\lll}} %left rotate <<< \newcommand{\hex}[1]{\texttt{#1}} \pagestyle{empty} \begin{document} %this ia a comment within the body %originally value was within begin/end equation \begin{equation} b = \sum_{i=0}^{n}{2^i} \end{equation} \begin{equation} a = \sum_{i=0}^{n}{2^i} \end{equation} \begin{eqnarray} a &\lr& b\\ c &\rr& d\\ e &\ls& f\\ g &\rs& h \end{eqnarray} \end{document}