 4pt;\">";
		formula_html += "<table><tr><td rowspan=2>a</td><td style=\"font-size: 10pt;\">&nbsp;</td></tr><tr><td style=\"font-size: 10pt;\">" + String(i) + "</td></tr></table>"
		formula_html += "</td>";
		formula_html += "</tr>";
	}
	formula_html += "</table>"; // x
	formula_html += "</td>";
	formula_html += "<td class=\"close_matrix\"></td>";

	formula_html += "<td style=\"font-size: 24pt;\">&nbsp; = &nbsp;</td>";

	formula_html += "<td class=\"open_matrix\"></td>";
	formula_html += "<td>";
	formula_ht