Basic test of <mglyph> This test fonts that are likely to exist on the user's system, as well as fonts that won't exist.
<math xmlns="http://www.w3.org/1998/Math/MathML"> <mi> <mglyph fontfamily="my-braid-font" index="2" alt="23braid"/> </mi> <mspace width="10px"/> <mn> <mglyph fontfamily="Curlz MT" index="65" alt="script 'A'"/> </mn> <mspace width="10px"/> <mn> <mglyph fontfamily="Arial" index="97" alt="lowercase 'a'"/> </mn> </math>