mml=<math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mfenced separators="|"><mrow><msup><mi mathvariant="normal">x</mi><mn>2</mn></msup><mo>+</mo><mfrac><mn>2</mn><mi mathvariant="normal">x</mi></mfrac></mrow></mfenced><mn>15</mn></msup><mo> </mo></math>