\documentclass{article}
\title{Keywords: Expanded; Ignore Catcodes}

\begin{document}
\def\mytrue{true}%
\def\myp{p}%
\def\myt{t}%
{\catcode`\t=12\relax\xdef\myppp{pt}}%
\def\myi{i}%
\def\myn{n}%
\def\myzero{0}%
\def\myone{1}%
\def\mytwo{2}%
\def\mythree{3}%
\def\myfour{4}%
\def\myat{at}
\def\myby{by}
\def\myto{to}
\def\myplus{plus}
\def\myminus{minus}
\def\myfil{fil}
\def\myfill{fill}
\def\myfilll{filll}
\def\myscaled{scaled}
\def\myspread{spread}

\section{Arithmetic}
\newcount\TXTcnt
\newcount\MCRcnt
\TXTcnt=2\relax\advance\TXTcnt by 4\multiply\TXTcnt by 2\relax
\MCRcnt=\mytwo\relax\advance\MCRcnt\myby \myfour\multiply\MCRcnt\myby\mytwo\relax
\the\TXTcnt = \the\MCRcnt

\divide\TXTcnt by 3\relax
\divide\MCRcnt\myby\mythree\relax
\the\TXTcnt = \the\MCRcnt

\section{Dimensions}
\newdimen\TXTdim%
\newdimen\MCRdim%


\TXTdim=1pt\relax%
\MCRdim=\myone\myp\myt%
\the\TXTdim = \the\MCRdim

\TXTdim=1in\relax
\MCRdim=\myone\myi\myn%
\the\TXTdim = \the\MCRdim

\TXTdim=1truein\relax
\MCRdim=\myone\mytrue\myi\myn%
\the\TXTdim = \the\MCRdim
\section{Glue}
\newskip\TXTskip
\newskip\MCRskip
\TXTskip=1pt plus 1pt minus 1pt
\MCRskip=\myone\myppp\myplus\myone\myppp\myminus\myone\myppp
\the\TXTskip = \the\MCRskip

\TXTskip=1pt plus 1fill minus 1fil
\MCRskip=\myone\myppp\myplus\myone\myfill\myminus\myone\myfil
\the\TXTskip = \the\MCRskip

\section{Boxes}
\newbox\TXTbox
\newbox\MCRbox

\setbox\TXTbox\hbox to 10pt{Hello}%
\setbox\MCRbox\hbox\myto\myone\myzero\myp\myt{Hello}%
\the\wd\TXTbox = \the\wd\MCRbox

\setbox\TXTbox\hbox spread 2pt{Hello}%
\setbox\MCRbox\hbox\myspread\mytwo\myp\myt{Hello}%
\the\wd\TXTbox = \the\wd\MCRbox
\end{document}

