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<!DOCTYPE html>
<html>
<head>
<style>
/* Default CSS Values */
sup {
  vertical-align: super;
  font-size: smaller;
}
</style>
</head>
<body>
<p>A sup element is displayed like this:</p>
<p>This text contains <sup>superscript text</sup></p>
<p>A customized sup element (changed "font-size"):</p>
<p>This text contains <sup style="font-size:25px;">superscript text</sup></p>
</body>
</html>