Two questions about lists
<ol>
<li><p>I would like to remove the outer list of the doubled lists, <code>[[1,2,3,4,5]]</code> -> <code>[1,2,3,4,5]</code></p></li>
<li><p>I want to count the elements in the list, <code>[[1,2,3,4,2,1,4]]</code> -> <code>7</code></p></li>
</ol>