failed

mid2

tall mid

W3C sample	WIRIS
	$∣ \frac{H}{K} ∣$

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <mo>&#x2223;</mo>
  <mfrac>
    <mi>H</mi>
    <mi>K</mi>
  </mfrac>
  <mo>&#x2223;</mo>
</math>

Author: Design Science, Inc. (E. Cannon, E. Tabacman, R.Miner)