data/mathematical/212.mml
<math xmlns='http://www.w3.org/1998/Math/MathML' display='inline'><semantics><mrow><mi>ψ</mi><mo stretchy="false">(</mo><mi>a</mi><mo>+</mo><mi>b</mi><mo stretchy="false">)</mo><mo>=</mo><mi>ψ</mi><mo stretchy="false">(</mo><mi>a</mi><mo stretchy="false">)</mo><mover><mo lspace="verythinmathspace" rspace="0em">+</mo><mo>˜</mo></mover><mi>ψ</mi><mo stretchy="false">(</mo><mi>b</mi><mo stretchy="false">)</mo></mrow><annotation encoding='application/x-tex'>\psi(a+b)=\psi(a)\widetilde{+}\psi(b)</annotation></semantics></math>