<html xmlns="http://www.w3.org/1999/xhtml" xmlns:math="http://www.w3.org/1998/Math/MathML">

<body onload="document.getElementById('s').firstChild.splitText(1);">

<math:msqrt><span xmlns="http://www.w3.org/1999/xhtml" id="s">x <math:mo/></span></math:msqrt>

</body>

</html>