<?xml version="1.0" encoding="UTF-8"?>
<math xmlns="http://www.w3.org/1998/Math/MathML">
   <msub>
      <mi>h</mi>
      <mi>i</mi>
   </msub>
   <mo>:</mo>
   <mi>X</mi>
   <mfenced close="}" open="{">
      <mn>-1</mn>
      <mrow>
         <mo>+</mo>
         <mn>1</mn>
      </mrow>
   </mfenced>
</math>
