<ol>
<li><p>Comments don't support much formatting.  Data and images will not work well with them.</p></li>
<li><p>It's probably best to post a reply to your own question.</p></li>
<li><p>Spreadsheet stuff comes with tabs and extra spaces that confound the markup here.  One solution is to paste from the spreadsheet into a word processor, convert all tabs to spaces, and then paste that into a reply.</p></li>
<li><p>It believe you need a higher reputation to post images.  As a workaround you can upload an image on the Web and include a link to it in your post.  A higher-rep user will likely come along to turn that link into an embedded image.</p></li>
</ol>
