<svg xmlns="http://www.w3.org/2000/svg" xmlns:wrs="http://www.wiris.com/xml/mathml-extension" height="24" width="33" wrs:baseline="15"><!--MathML: <math xmlns="http://www.w3.org/1998/Math/MathML"><mi>C</mi><msub><mi>O</mi><mn>3</mn></msub></math>--><defs><style type="text/css"/></defs><text font-family="Arial" font-size="16" font-style="italic" text-anchor="middle" x="6.5" y="15">C</text><text font-family="Arial" font-size="16" font-style="italic" text-anchor="middle" x="18.5" y="15">O</text><text font-family="Arial" font-size="12" text-anchor="middle" x="28.5" y="20">3</text></svg>