 Maxima's computation.  This is useful if you are computing some long
  intermediate result, and you don't want to waste time having it
  displayed on the screen.
<div class="p"><!----></div>
</li>

<li> If you wish to repeat a command which you have already given,
  say on line <tt>(%i5)</tt>, you may do so without typing it over again
  by preceding its label with two single quotes (<tt>"</tt>), i.e., <tt>
    "%i5</tt>. (Note that simply inputing <tt>%i5</tt> will not do the job
  - try it.)
<div class="