title: HTML to type bar above a number(vinculam symbol)
body: <p>I am a Blogger. It is very necessary for me to write bar above numbers. I googled it several times. But there was no articles about this. Most of the articles are discussing about putting bar above letters(texts). That didn't worked for numbers. For example in this mathforum <a href="http://mathforum.org/library/drmath/view/57579.html" rel="nofollow noreferrer">article</a> they added a bar above numbers  several times. I tried to put bar above 67 using <code>67x&amp;#772;</code> But this only showed bar  above 7, and this bar above 7 was not legible. Is it only possible with Mathjax? How can I write bar above numbers for blogger?</p>