data/mathematica/257.mml
<math
xmlns='http://www.w3.org/1998/Math/MathML'>
<semantics>
<msub>
<semantics>
<mi>c</mi>
<annotation encoding='Mathematica'>TagBox["c", C]</annotation>
</semantics>
<mi>K</mi>
</msub>
<annotation-xml encoding='MathML-Content'>
<apply>
<ci>C</ci>
<ci>K</ci>
</apply>
</annotation-xml>
</semantics>
</math>