<svg xmlns="http://www.w3.org/2000/svg" xmlns:wrs="http://www.wiris.com/xml/mathml-extension" height="29" width="27" wrs:baseline="18"><!--MathML: <math xmlns="http://www.w3.org/1998/Math/MathML"><mmultiscripts><mi mathvariant="normal">N</mi><mprescripts/><mn>7</mn><mn>15</mn></mmultiscripts></math>--><defs><style type="text/css"/></defs><text font-family="Arial" font-size="12" text-anchor="middle" x="10.5" y="25">7</text><text font-family="Arial" font-size="12" text-anchor="middle" x="6.5" y="11">15</text><text font-family="Arial" font-size="16" text-anchor="middle" x="20.5" y="18">N</text></svg>