<math display='block'> <mml:mrow> <mml:mi>M</m:mi><mml:mi>S</m:mi><mml:mi>E</m:mi><mml:mo stretchy='false'>(</m:mo><mml:mover accent='true'> <mml:mi>&#x03B8;</m:mi> <mml:mo>&#x005E;</m:mo> </m:mover> <mml:mo stretchy='false'>)</m:mo><mml:mo>=</m:mo><mml:mi>V</m:mi><mml:mi>a</m:mi><mml:mi>r</m:mi><mml:mo stretchy='false'>(</m:mo><mml:mover accent='true'> <mml:mi>&#x03B8;</m:mi> <mml:mo>&#x005E;</m:mo> </m:mover> <mml:mo stretchy='false'>)</m:mo><mml:mo>+</m:mo><mml:msup> <mml:mrow> <mml:mo stretchy='false'>(</m:mo><mml:mi>B</m:mi><mml:mi>i</m:mi><mml:mi>a</m:mi><mml:mi>s</m:mi><mml:mo stretchy='false'>(</m:mo><mml:mover accent='true'> <mml:mi>&#x03B8;</m:mi> <mml:mo>&#x005E;</m:mo> </m:mover> <mml:mo>,</m:mo><mml:mi>&#x03B8;</m:mi><mml:mo stretchy='false'>)</m:mo><mml:mo stretchy='false'>)</m:mo> </m:mrow> <mml:mn>2</m:mn> </m:msup> </m:mrow> </m:math>