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chromium/content/test/data/accessibility/html/math-name-from-contents.html 

<!DOCTYPE html>
<html>

<body>

  <div role="radio" tabindex=0>
    <span>Both&nbsp;</span>
    <math role="math"><mn>1</mn><mo>+</mo><mn>4</mn></math>
    <span>&nbsp;and&nbsp;</span>
    <math><mn>2</mn><mo>+</mo><mn>3</mn></math>
  </div>

</body>

</html>