<tt>b</tt><tt>=</tt><tt>c</tt> to <tt>b</tt><tt>=</tt><tt>d</tt>.  The limits of integration <tt>c</tt>
  and <tt>d</tt> may be taken is <tt>inf</tt> (positive infinity) of <tt>
    minf</tt> (negative infinity).</dd>
 <dt><b><tt>invert(a)</tt></b></dt>
	<dd> Computes the inverse of the square matrix <tt>
    a</tt>.</dd>
 <dt><b><tt>kill(a)</tt></b></dt>
	<dd> Removes the variable <tt>a</tt> with all its
  assignments and properties from the current Maxima environment.</dd>
 <dt><b><tt>limit(a,b,c)</tt></b