data/mathematical/293.mml
<math xmlns='http://www.w3.org/1998/Math/MathML' display='inline'><semantics><mrow><mi>a</mi><msup><mi>x</mi> <mn>2</mn></msup><mo>+</mo><mi>b</mi><mi>x</mi><mo>+</mo><mi>c</mi><mo>=</mo><mn>0</mn></mrow><annotation encoding='application/x-tex'>ax^2+bx+c=0</annotation></semantics></math>