mml=<math xmlns="http://www.w3.org/1998/Math/MathML"><mi mathvariant="normal">P</mi><mfenced separators="|"><mover><mi mathvariant="normal">B</mi><mo>&#xAF;</mo></mover></mfenced><mo>=</mo><mn>0.8</mn><mo>,</mo><mi mathvariant="normal">P</mi><mfenced separators="|"><mrow><mi mathvariant="normal">A</mi><mo>&#x222A;</mo><mi mathvariant="normal">B</mi></mrow></mfenced><mo>=</mo><mn>0.5</mn></math>