data/mathematical/301.mml
<math xmlns='http://www.w3.org/1998/Math/MathML' display='inline'><semantics><mrow><mo>∇</mo><mo>×</mo><mstyle mathvariant="bold"><mi mathvariant="bold">E</mi></mstyle><mo>=</mo><mo>−</mo><mfrac><mrow><mo>∂</mo><mstyle mathvariant="bold"><mi mathvariant="bold">B</mi></mstyle></mrow><mrow><mo>∂</mo><mi>t</mi></mrow></mfrac></mrow><annotation encoding='application/x-tex'>\nabla \times \mathbf{E} = -\frac{\partial \mathbf{B}} {\partial t}</annotation></semantics></math>