(<span class="hljs-name"><span class="hljs-built_in">lambda</span></span> (x y z) (<span class="hljs-name"><span class="hljs-built_in">+</span></span> y z))

(<span class="hljs-name"><span class="hljs-built_in">define</span></span> add-point
  (<span class="hljs-name"><span class="hljs-built_in">lambda</span></span> [p1 p2]
    (<span class="hljs-name">make-point</span>
      (<span class="hljs-name"><span class="hljs-built_in">+</span></span> (<span class="hljs-name">point-x</span> p1) (<span class="hljs-name">point-x</span> p2))
      (<span class="hljs-name"><span class="hljs-built_in">+</span></span> (<span class="hljs-name">point-y</span> p1) (<span class="hljs-name">point-y</span> p2)))))