ag-gipp/GoUldI

<math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mi>cos</mi><mn>2</mn></msup><mfenced close=")" open="("><mi>u</mi></mfenced><mo>-</mo><msup><mi>cos</mi><mn>2</mn></msup><mfenced close=")" open="("><mi>v</mi></mfenced><mo>=</mo><mo>-</mo><mi>sin</mi><mfenced close=")" open="("><mrow><mi>u</mi><mo>+</mo><mi>v</mi></mrow></mfenced><mi>sin</mi><mfenced close=")" open="("><mrow><mi>u</mi><mo>-</mo><mi>v</mi></mrow></mfenced></math>