data/mathoid/223.mml
<math
xmlns="http://www.w3.org/1998/Math/MathML" display="block" alttext="c">
<semantics>
<mi data-semantic-type="identifier" data-semantic-role="latinletter" data-semantic-font="italic" data-semantic-id="0">c</mi>
<annotation encoding="application/x-tex">c</annotation>
</semantics>
</math>