mml=<math xmlns="http://www.w3.org/1998/Math/MathML"><mstyle mathsize="12px"><mrow><mo>&#x21D2;</mo><mfenced separators="|"><mrow><mn>223</mn><mo>+</mo><mi mathvariant="normal"></mi><mo>?</mo></mrow></mfenced><mo>=</mo><mn>8</mn><mi mathvariant="normal"></mi><mo>&#xD7;</mo><mn>71</mn><mspace linebreak="newline"/><mi mathvariant="normal"></mi><mo>&#x21D2;</mo><mi mathvariant="normal"></mi><mo>?</mo><mo>=</mo><mn>568</mn><mo>-</mo><mn>223</mn><mo>=</mo><mn>345</mn></mrow></mstyle></math>