d></tr><tr><td style=\"font-size: 10pt;\">k</td></tr></table>"
				else
					formula_html += "<table><tr><td rowspan=2>x</td><td style=\"font-size: 10pt;\">" + String(i + j) + "</td></tr><tr><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>";