mml=<math xmlns="http://www.w3.org/1998/Math/MathML"><mfrac><mrow><mo>-</mo><mn>3</mn></mrow><mn>2</mn></mfrac><mo>+</mo><mfenced separators="|"><mfrac><mn>2</mn><mn>3</mn></mfrac></mfenced><mfenced separators="|"><mrow><mn>3</mn><mi mathvariant="normal">x</mi><mo>+</mo><mn>9</mn></mrow></mfenced><mo>=</mo><mfrac><mi mathvariant="normal">x</mi><mn>2</mn></mfrac><mo>,</mo><mi mathvariant="normal">&#xA0;</mi></math>