data/mathematical/103.mml
<math xmlns='http://www.w3.org/1998/Math/MathML' display='inline'><semantics><mrow><mi><mrow><mi>p</mi><mi>h</mi></mrow></mi><mi>z</mi><mo>=</mo><mi>θ</mi><mo lspace="verythinmathspace" rspace="0em">+</mo><mn>2</mn><mi>n</mi><mi>π</mi></mrow><annotation encoding='application/x-tex'>\operatorname{ph}z=\theta+2n\pi</annotation></semantics></math>