title: How do you overline numbers in android xml?
body: <p>I am developing a maths app in which i have to use numbers with bar on top. check this link <a href="http://en.wikipedia.org/wiki/Overline" rel="nofollow">http://en.wikipedia.org/wiki/Overline</a></p>
  
  <p>Also how to use Exponentiation like in the following link <a href="http://en.wikipedia.org/wiki/Exponentiation" rel="nofollow">http://en.wikipedia.org/wiki/Exponentiation</a> in xml file.  </p>