mml=<math xmlns="http://www.w3.org/1998/Math/MathML"><mi mathvariant="normal">G</mi><mfenced separators="|"><mi mathvariant="normal">x</mi></mfenced><mo>=</mo><msqrt><mn>25</mn><mo>-</mo><msup><mi mathvariant="normal">x</mi><mn>2</mn></msup></msqrt></math>