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- This WPT test may be referenced by the following Test IDs:
            
- /mathml/crashtests/mozilla/375562-1.xhtml - WPT Dashboard Interop Dashboard
 
 
<head>
<script>
function boom()
{
  var a = document.getElementById("a");
  var plus = document.getElementById("plus");
  var frameset = document.createElementNS(HTML_NS, "frameset");
  document.body.style.width = "300px";
  a.parentNode.removeChild(a);
  plus.appendChild(frameset);
  document.documentElement.removeAttribute("class");
}
</script>
</head>
<body onload="setTimeout(boom, 30);">
  <msup>
    <mi id="a">a</mi>
    <mo id="plus">+</mo>
    <mi>b</mi>
    <mi>c</mi>
  </msup>
</math></div>
</body>
</html>