word">:private</span>
  <span class="mdzsyn-string">"var that is not exported."</span>
  <span class="mdzsyn-number">123</span>)

(<span class="mdzsyn-coresym">defn-</span> <span class="mdzsyn-symbol">private-fun</span>
  <span class="mdzsyn-string">"Sum three numbers."</span>
  [<span class="mdzsyn-symbol">x</span> <span class="mdzsyn-symbol">y</span> <span class="mdzsyn-symbol">z</span>]
  (<span class="mdzsyn-coresym">+</span> <span class="mdzsyn-symbol">x</span> <span class="mdzsyn-symbol">y</span> <spa