 of a lambda expression,
shown as &lt;tail expression&gt; below, occurs in a tail context.
<tt>(lambda&nbsp;&lt;formals&gt;<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;definition&gt;*&nbsp;&lt;expression&gt;*&nbsp;&lt;tail&nbsp;expression&gt;)<br>
</p>
</tt>
<li>
<p>If one of the following expressions is in a tail context,
then the subexpressions shown as &lt;tail expression&gt; are in a tail context.
These were derived from rules in the grammar given in
chapter&nbsp;<a href="r5rs-Z-