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  1. <?php

    $var1 = 5;
    $var2 = 7;
    $var3 = "iDevelop everyday";
    $var4 = "Like and subscribe or whatever";

    echo "<h1>".$var3."</h1>";
    echo "<h2>".$var3."</h2>";
    echo "<h3>".$var3."</h3>";
    echo "<h4>".$var4."</h4>";

    echo $var1 +$var2;

    ?>

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