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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>HTML Number Entities</title>
  <style>
    .circled-one::after {
      content: "\2776";
    }
  </style>
</head>
<body>
  <p>Digits (decimal refs): &#48;&#49;&#50;</p>
  <p>Fractions: &frac12; &frac14; &frac34;</p>
  <p>Powers: 10&sup2; m&sup3;</p>
  <p>Circled via CSS: <span class="circled-one"></span></p>
</body>
</html>

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