Italics, quotation marks, underscoring, etc.
There are times in these translations when one really needs to use these tools to clarify, e.g., when indicating the tile of a book or an article. Are they available
Yes!, check out this guide: http://www.reddit.com/r/duolingo/comments/1h9hvo/dowlingo_comment_formatting/
Also, if you have any other questions, check out this guide, it has a lot of useful information