mml=<math xmlns="http://www.w3.org/1998/Math/MathML"><mo>⇒</mo><msup><mfenced separators="|"><mrow><mn>2</mn><msqrt><mn>6</mn></msqrt></mrow></mfenced><mn>2</mn></msup><msup><mi>XZ</mi><mn>2</mn></msup><mo>-</mo><msup><mi>YZ</mi><mn>2</mn></msup></math>