chromium/third_party/blink/web_tests/external/wpt/mathml/presentation-markup/operators/op-dict-4.html

<!DOCTYPE html>
<html>
<head>
  <title>op-dict stretchy</title>
  <link rel="match" href="op-dict-4-ref.html">
</head>
<body>
  <math>
    <mrow>
      <mo stretchy="true">(</mo>
      <mfrac>
        <mi>a</mi>
        <mi>b</mi>
      </mfrac>
      <mo stretchy="true">)</mo>
    </mrow>
  </math>
</body>
</html>