ag-gipp/GoUldI

<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>ψ</mi><mfenced close=")" open="("><mrow><mi>a</mi><mo>+</mo><mi>b</mi></mrow></mfenced><mo>=</mo><mi>ψ</mi><mfenced close=")" open="("><mi>a</mi></mfenced><mover accent="true"><mo>+</mo><mo>˜</mo></mover><mi>ψ</mi><mfenced close=")" open="("><mi>b</mi></mfenced></math>