mml=<math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mi mathvariant="normal">a</mi><mn>4</mn></msup><mo>+</mo><mn>2</mn><mo>+</mo><mfrac><mn>1</mn><msup><mi mathvariant="normal">a</mi><mn>4</mn></msup></mfrac><mo>=</mo><msup><mfenced separators="|"><mrow><msup><mi mathvariant="normal">a</mi><mn>2</mn></msup><mo>+</mo><mfrac><mn>1</mn><msup><mi mathvariant="normal">a</mi><mn>2</mn></msup></mfrac></mrow></mfenced><mn>2</mn></msup><mspace linebreak="newline"/><mo>=</mo><msup><mfenced separators="|"><mrow><msup><mfenced separators="|"><msqrt><mn>3</mn></msqrt></mfenced><mn>2</mn></msup><mo>+</mo><mfrac><mn>1</mn><msup><mfenced separators="|"><msqrt><mn>3</mn></msqrt></mfenced><mn>2</mn></msup></mfrac></mrow></mfenced><mn>2</mn></msup><mspace linebreak="newline"/><mo>=</mo><msup><mfenced separators="|"><mrow><mn>3</mn><mo>+</mo><mfrac><mn>1</mn><mn>3</mn></mfrac></mrow></mfenced><mn>2</mn></msup><mo>=</mo><msup><mfenced separators="|"><mfrac><mn>10</mn><mn>3</mn></mfrac></mfenced><mn>2</mn></msup><mo>=</mo><mfrac><mn>100</mn><mn>9</mn></mfrac><mo>=</mo><mn>11</mn><mfrac><mn>1</mn><mn>9</mn></mfrac></math>