e="button" class="btn btn-dark float-right" title="Bookmark Exercise" onclick="bookmark('ch19ex7');" href="#"><i id="ch19ex7" class="fas fa-bookmark" style="color:white"></i></button>
<button type="button" class="btn btn-dark float-right" style="margin-left:10px; margin-right:10px;" title="Upvote Exercise" onclick="upvote('ex19.7);" href="#"><i id="ch19ex7" class="fas fa-thumbs-up" style="color:white"></i></button>
</div>
<div class="card-body">
<p class="card-text">

Suppose that is considering adding a li