<?xml version="1.0" encoding="UTF-8"?>

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">  <mfrac>    <mrow>      <maction actiontype="tooltip">        <mn>43867</mn>         <mtext>Mouse pointer is over numerator</mtext>       </maction>     </mrow>     <mrow>      <maction actiontype="tooltip">        <mn>798</mn>         <mtext>Mouse pointer is over denominator</mtext>       </maction>     </mrow>   </mfrac> </math>