ula_html += "<tr><td style=\"font-size: 10pt;\">k</td><td style=\"font-size: 10pt;\">k</td></tr></table>"
		}
		formula_html += "</td>";
		formula_html += "</tr><tr><td style=\"font-size:20pt;\">";
		formula_html += "&Sigma;";
		formula_html += "</td></tr><tr><td align=\"center\" style=\"font-size: 10pt;\">";
		formula_html += "k=1";
		formula_html += "</td></tr>";
		formula_html += "</table>";
		formula_html += "</td>";
		formula_html += "</tr>";
	}
	formula_html += "</table>"; // B
	formula_html += "</td>