data/mathematical/115.mml
<math xmlns='http://www.w3.org/1998/Math/MathML' display='inline'><semantics><mrow><msub><mi>E</mi> <mrow><mn>2</mn><mi>n</mi><mo>+</mo><mn>1</mn></mrow></msub><mo>=</mo><mn>0</mn></mrow><annotation encoding='application/x-tex'>E_{2n+1}=0</annotation></semantics></math>