mml=<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>In</mi><mfenced open="|" close="|" separators="|"><mfrac><mrow><msup><mi mathvariant="normal">x</mi><mn>2</mn></msup><mo>+</mo><msqrt><msup><mi mathvariant="normal">x</mi><mn>2</mn></msup><mo>+</mo><msup><mi mathvariant="normal">a</mi><mn>2</mn></msup></msqrt></mrow><mi mathvariant="normal">a</mi></mfrac></mfenced><mo>+</mo><mi mathvariant="normal">C</mi></math>