<?xml version="1.0" encoding="UTF-8"?>
<math xmlns="http://www.w3.org/1998/Math/MathML">
   <msubsup>
      <mi>S</mi>
      <mi>p</mi>
      <mi>m</mi>
   </msubsup>
   <mfenced close=")" open="(">
      <mi>x</mi>
      <mi>ξ</mi>
   </mfenced>
   <mi>sin</mi>
   <mfenced close=")" open="(">
      <mrow>
         <mi>m</mi>
         <mi>x</mi>
      </mrow>
   </mfenced>
</math>
