centerbaseline=false
mml=<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>y</mi><mo>=</mo><mi>sin</mi><mfenced><mrow><mi>x</mi><mo>-</mo><mfrac><mi mathvariant="normal">π</mi><mn>3</mn></mfrac></mrow></mfenced></math>
