mml=<math xmlns="http://www.w3.org/1998/Math/MathML"><mroot><mrow><msup><mfenced><mrow><mn>13</mn><mo>.</mo><mn>608</mn></mrow></mfenced><mn>2</mn></msup><mo>-</mo><msup><mfenced><mrow><mn>13</mn><mo>.</mo><mn>392</mn></mrow></mfenced><mn>2</mn></msup></mrow><mn>3</mn></mroot></math>