background: blue"></span>
    <math>
      <mpadded id="dynamic-attach" style="background: lightgreen"/>
      <mpadded id="dynamic-remove" width="10px" height="20px" depth="30px" style="background: lightyellow"/>
      <mpadded id="dynamic-modify" width="100px" height="200px" depth="300px" style="background: pink"/>
    </math>
  </p>
</body>
</html>
