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 to 40</span>
((<span class="mdzsyn-coresym">fn</span> [<span class="mdzsyn-symbol">x</span> <span class="mdzsyn-symbol">y</span> <span class="mdzsyn-symbol">&amp;</span>] (<span class="mdzsyn-coresym">+</span> <span class="mdzsyn-symbol">x</span> <span class