Important Derivatives & Integrals

$pre_file="fsc_derivative_integration_formulas";
$location="../files/fsc/fsc_part2";
print <<< HTML
<table width="100%" border="2" cellpadding="2" cellspacing="2">
    <tr>
    <td align="center"><strong><img src="/images/icon_pdf.gif" alt="PDF" />&nbsp; &nbsp;<a href="$location/dn.php?file=$pre_file.pdf" alt="$pre_file.pdf">Download PDF</a></strong></td>
  </tr>
</table>
<img src="$location/$pre_file.gif" alt="PDF View" class="mediacenter img-responsive" />
<table width="100%" border="2" cellpadding="2" cellspacing="2">
    <tr>
    <td align="center"><strong><img src="/images/icon_pdf.gif" alt="PDF" />&nbsp; &nbsp;<a href="$location/dn.php?file=$pre_file.pdf" alt="$pre_file.pdf">Download PDF</a></strong></td>
  </tr>
</table>
HTML;