data/mathtoweb/149.mml
<math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>C</mi><mrow><mo rspace="0.3em" lspace="0em" stretchy="true" fence="true" form="prefix">(</mo><mi>z</mi><mo rspace="0em" lspace="0.3em" stretchy="true" fence="true" form="postfix">)</mo></mrow><mo>±</mo><mi>i</mi><mi>S</mi><mrow><mo rspace="0.3em" lspace="0em" stretchy="true" fence="true" form="prefix">(</mo><mi>z</mi><mo rspace="0em" lspace="0.3em" stretchy="true" fence="true" form="postfix">)</mo></mrow><mo>=</mo><mstyle scriptlevel="0" displaystyle="false"><mrow><mfrac linethickness="1"><mn>1</mn><mn>2</mn></mfrac></mrow></mstyle><mrow><mo form="prefix">(</mo><mn>1</mn><mo>±</mo><mi>i</mi><mo form="postfix">)</mo></mrow><mi>erf</mi><mi>ζ</mi></mrow></math>