data/mathematical/180.mml
<math xmlns='http://www.w3.org/1998/Math/MathML' display='inline'><semantics><mrow><mi>n</mi><mo>=</mo><msubsup><mi>x</mi> <mn>1</mn> <mn>2</mn></msubsup><mo>+</mo><msubsup><mi>x</mi> <mn>2</mn> <mn>2</mn></msubsup><mo>+</mo><mi>…</mi><mo>+</mo><msubsup><mi>x</mi> <mi>k</mi> <mn>2</mn></msubsup></mrow><annotation encoding='application/x-tex'>n=x_{1}^{2}+x_{2}^{2}+\dots+x_{k}^{2}</annotation></semantics></math>