Markup in general
Markdown works. Here I'd use underline as an example, but you can't do that in Markdown, so:
And, as you may have figured already with the examples staring you in the face, you can mix and match within the same post.
<u>Underlined [b]bold _italic_[/b]</u>-> Underlined [b]bold italic[/b].
Feel free to experiment. Don't expect everything from your favorite markup language to work however. Or well if used in conjunction with any of the other two.
This post is deleted!