mml=<math xmlns="http://www.w3.org/1998/Math/MathML"><mfenced open="[" close="]"><mrow><mo>(</mo><mn>1</mn><mo>.</mo><mn>3</mn><msup><mo>)</mo><mn>2</mn></msup><mo>&#xD7;</mo><mo>(</mo><mn>4</mn><mo>.</mo><mn>2</mn><msup><mo>)</mo><mn>2</mn></msup></mrow></mfenced><mo>&#xF7;</mo><mn>2</mn><mo>.</mo><mn>7</mn><mo>=</mo><mo>?</mo></math>