\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*}
\begin{aligned}
    A_{i+1} &= A_i \lr 5 + W_i + f(B_i,C_i,D_i) + K_i\\
    B_{i+1} &= A_i\\
    C_{i+1} &= B_i \rr \\
    D_{i+1} &= C_i\\
    E_{i+1} &= D_i
\end{aligned}
\end{equation*}

\end{document}