un</code> to <code>lst</code>. If additional <code>any</code>
arguments are given, they are applied as leading elements of <code>lst</code>.
<code>(apply 'fun 'lst 'any1 'any2)</code> is equivalent to <code>(apply 'fun
(cons 'any1 'any2 'lst))</code>.

<pre>
: (apply + (1 2 3))
-> 6
: (apply * (5 6) 3 4)
-> 360
: (apply '((X Y Z) (* X (+ Y Z))) (3 4 5))
-> 27
: (apply println (3 4) 1 2)
1 2 3 4
-> 4
</pre></dd>

<dt><a id="arg"><code>(arg 'cnt) -> any</code></a></dt>
<dd>Can only be used inside functions wi