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

	formula_html += "<td class=\"open_matrix\"></td>";
	formula_html += "<td>";
	formula_html += "<table>"; // B
	for(var i = 0; i < points_for_interpolation.length; ++i) {
		formula_html += "<tr>";
		formula_html += "<td style=\"padding:2pt 6pt 2pt 6pt;\">";
		formula_html += "<table><tr><td rowspan=2>y</td><td style=\"font-size: 10pt;\">&nbsp;</td></tr><tr><td style=\"font-size: 10pt;\">" + String(i + 1) + "</td></tr></table>";
		formula_html += "</td>";
		fo