mnSdisplaystyle9

W3C sample	WIRIS
	${\displaystyle 5+23+0.5+5.0+.1+100+\mathrm{0xFFEF}+5+5}$

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <mstyle displaystyle="true">
    <mrow>
      <mn>5</mn>
      <mo>+</mo>
      <mn fontweight="bold">23</mn>
      <mo>+</mo>
      <mn fontweight="normal" fontstyle="italic">0.5</mn>
      <mo>+</mo>
      <mn fontstyle="normal">5.0</mn>
      <mo>+</mo>
      <mn fontweight="bold" fontstyle="normal">.1</mn>
      <mo>+</mo>
      <mn color="#9c0fff">100</mn>
      <mo>+</mo>
      <mn color="#0ee">0xFFEF</mn>
      <mo>+</mo>
      <mn color="Green">5</mn>
      <mo>+</mo>
      <mn fontfamily="Helvetica">5</mn>
    </mrow>
  </mstyle>
</math>

Author: Robert Miner and Jeff Schaefer, Geometry Technologies