data/mathematical/17.mml
<math xmlns='http://www.w3.org/1998/Math/MathML' display='inline'><semantics><mrow><msub><mstyle mathvariant="bold"><mi mathvariant="bold">m</mi></mstyle> <mn>1</mn></msub></mrow><annotation encoding='application/x-tex'>\mathbf{m}_1</annotation></semantics></math>