You can use the HTML Maker in my signature. Or you can upload a picture of your workbook to a file sharing site such as Dropbox, then post a link to the picture. You can even upload your workbook to such a site and post a link, but many people will not open files from the internet for security reasons. Finally, when posting, you can click the "Go Advanced" button in the bottom right. That will open a larger toolbar, including a table tool. You can manually create a table showing your data and expected results. Somewhat tedious, but if your example isn't too large, it could work.