<html xmlns="http://www.w3.org/1999/xhtml" xmlns:m="http://www.w3.org/1998/Math/MathML">
<body>
<p><m:math><m:mstyle scriptlevel="0" scriptsizemultiplier="0.5" scriptminsize="18px" style="font-size:48px;">
  <m:mstyle scriptlevel="+1"><m:mstyle style="font-family:serif;"><m:mi>Id</m:mi></m:mstyle></m:mstyle>
</m:mstyle></m:math></p>
</body>
</html>
