<?xml version="1.0" encoding="UTF-8"?>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
  <title>mfenced open close</title>
</head>
<body>
<p><math xmlns="http://www.w3.org/1998/Math/MathML">
  <mfenced open="a a">
    <mi>xxxxxxxxxx</mi>
  </mfenced>
</math></p>
<p><math xmlns="http://www.w3.org/1998/Math/MathML">
  <mfenced open="a a">
    <mi>xxxxxxxxxx</mi>
  </mfenced>
</math></p>
<p><math xmlns="http://www.w3.org/1998/Math/MathML">
  <mfenced open="a a">
    <mi>xxxxxxxxxx</mi>
  </mfenced>
</math></p>
<p><math xmlns="http://www.w3.org/1998/Math/MathML">
  <mfenced open="a a">
    <mi>xxxxxxxxxx</mi>
  </mfenced>
</math></p>
<p><math xmlns="http://www.w3.org/1998/Math/MathML">
  <mfenced open="a a">
    <mi>xxxxxxxxxx</mi>
  </mfenced>
</math></p>
<p><math xmlns="http://www.w3.org/1998/Math/MathML">
  <mfenced open="a a">
    <mi>xxxxxxxxxx</mi>
  </mfenced>
</math></p>
<p><math xmlns="http://www.w3.org/1998/Math/MathML">
  <mfenced open="a a">
    <mi>xxxxxxxxxx</mi>
  </mfenced>
</math></p>
<p><math xmlns="http://www.w3.org/1998/Math/MathML">
  <mfenced open="a a">
    <mi>xxxxxxxxxx</mi>
  </mfenced>
</math></p>
<p><math xmlns="http://www.w3.org/1998/Math/MathML">
  <mfenced open="a a">
    <mi>xxxxxxxxxx</mi>
  </mfenced>
</math></p>
<p><math xmlns="http://www.w3.org/1998/Math/MathML">
  <mfenced open="a a">
    <mi>xxxxxxxxxx</mi>
  </mfenced>
</math></p>
</body>
</html>