mml=<math xmlns="http://www.w3.org/1998/Math/MathML"><msqrt><mi>x</mi><mo> </mo><mo>+</mo><mo> </mo><mn>6</mn></msqrt><mo> </mo><mo>=</mo><mo> </mo><msqrt><mn>121</mn></msqrt><mo> </mo><mo>-</mo><mo> </mo><msqrt><mn>36</mn></msqrt></math>