<?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>
