mml=<math xmlns="http://www.w3.org/1998/Math/MathML"><mstyle mathsize="12px"><mrow><mo>⇒</mo><mn>2</mn><mo>×</mo><mfrac><mn>22</mn><mn>7</mn></mfrac><mo>×</mo><mi mathvariant="normal">x</mi><mfenced separators="|"><mrow><mi mathvariant="normal">x</mi><mo>+</mo><mn>30</mn><mo>-</mo><mi mathvariant="normal">x</mi></mrow></mfenced><mo>=</mo><mn>2640</mn></mrow></mstyle></math>