content.html

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title>Содержание сайта</title>
    <style type="text/css">
        .header2 {
            color:Black;
            font-family:"Times New Roman",serif;
            font-style:normal;
            font-size:20px;
            font-weight:bold;
            text-align:center;
            text-decoration:underline;
        }
        #formula {
            font-size:30px;
            color:#006400;
            text-align:center;
        }
        #index {
            vertical-align: super;
        }
    </style>

</head>
<body>
    <p class="header2" title="Формула">
    Формула:</p>
    <p id="formula" title="Формула">
    E=mc<span id="index">2</span></p>
</body>
</html>