HTML Code

<!DOCTYPE html>
<html>
<head>
  <style>.sqrt-css::after{content:"\221A"}</style>
</head>
<body>
  <h1>HTML Math Entities</h1>
  <p>&sum; &int; &infin; &times; &divide; &ne;</p>
  <p>Hex: &#x2211; &#x222B; &nbsp; Partial: &part;</p>
  <p>Sqrt via CSS: <span class=sqrt-css></span></p>
</body>
</html>

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