<?xml version="1.0" encoding="UTF-8"?>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<mfenced close="}" open="{">
<mrow>
<mi>C</mi>
<mo>:</mo>
<msub>
<mi>K</mi>
<mi>X</mi>
</msub>
<mo>⋅</mo>
<mi>C</mi>
<mo>=</mo>
<mn>0</mn>
</mrow>
</mfenced>
</math>