e nohighlight">\(y\)</span>
in R2 and all other registers empty; moreover, running
<span class="math notranslate nohighlight">\(y\)</span>  with R2 empty results in <span class="math notranslate nohighlight">\(x\)</span> back in R2  (not R1) and all
other registers empty.</p>
</div>
</div>
</div>
</div>
<div class="tex2jax_ignore mathjax_ignore section" id="the-notation-on-words">
<h1>The <span class="math notranslate nohighlight">\(+\)</span> notation on words<a class="headerlink" href="#the-notation-on-wo