manuals required

I have no idea what your code is supposed to do

<math xmlns=”http://www.w3.org/1998/Math/MathML”><msup><mrow><mfenced separators=””><mrow><mfenced separators=”” open=”|” close=”|”><mi mathvariant=”italic”>a</mi></mfenced></mrow></mfenced></mrow><mrow><mn>2</mn></mrow></msup><mo>+</mo><msup><mrow><mfenced separators=””><mrow><mfenced separators=”” open=”|” close=”|”><mi mathvariant=”italic”>b</mi></mfenced></mrow></mfenced></mrow><mrow><mn>2</mn></mrow></msup><mo>=</mo><mn>0</mn></math>

The page I need help with: [log in to see the link]