l.
</p>
<pre class="mendoza-codeblock"><code data-language="janet"><span class="mdzsyn-comment"># Evaluates to 40</span>
((<span class="mdzsyn-coresym">fn</span> [<span class="mdzsyn-symbol">x</span> <span class="mdzsyn-symbol">y</span>] (<span class="mdzsyn-coresym">+</span> <span class="mdzsyn-symbol">x</span> <span class="mdzsyn-symbol">x</span> <span class="mdzsyn-symbol">y</span>)) <span class="mdzsyn-number">10</span> <span class="mdzsyn-number">20</span>)
<span class="mdzsyn-comment"># Also evaluates