chromium/content/test/data/accessibility/html/math.html

<!--
@WIN-ALLOW:inner_html*
@MAC-ALLOW:AXRoleDescription
FIXME: mi text content is italicized because otherwise we
run into crbug.com/750990.
-->
<!DOCTYPE html>
<html>
<body>
  <math xmlns="http://www.w3.org/1998/Math/MathML">
    <mrow>
      <msup><mi>&#x1d434;</mi><mn>2</mn></msup>
      <mo>+</mo>
      <msup><mi>&#x1d435;</mi><mn>2</mn></msup>
    </mrow>
 </math>
</body>
</html>