mml=<math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mfenced><mrow><mi>a</mi><mo>+</mo><mfrac><mn>1</mn><mi>a</mi></mfrac></mrow></mfenced><mn>2</mn></msup><mo>=</mo><mn>3</mn><mo>,</mo></math>