mml=<math xmlns="http://www.w3.org/1998/Math/MathML"><mstyle mathsize="12px"><mrow><mi mathvariant="normal">I</mi><mo>.</mo><mn>2</mn><msup><mi mathvariant="normal">x</mi><mn>2</mn></msup><mo>-</mo><mfenced separators="|"><mrow><mn>4</mn><mo>+</mo><msqrt><mn>12</mn></msqrt></mrow></mfenced><mi mathvariant="normal">x</mi><mo>+</mo><mn>2</mn><msqrt><mn>13</mn></msqrt><mo>=</mo><mn>0</mn><mspace linebreak="newline"/><mi>II</mi><mo>.</mo><mn>10</mn><msup><mi mathvariant="normal">y</mi><mn>2</mn></msup><mo>-</mo><mfenced separators="|"><mrow><mn>18</mn><mo>+</mo><mn>5</mn><msqrt><mn>13</mn></msqrt></mrow></mfenced><mi mathvariant="normal">y</mi><mo>+</mo><mn>9</mn><msqrt><mn>13</mn></msqrt><mo>=</mo><mn>0</mn></mrow></mstyle></math>