ag-gipp/GoUldI

<math xmlns="http://www.w3.org/1998/Math/MathML"><msubsup><mi>S</mi><mi>p</mi><mi>m</mi></msubsup><mfenced close=")" open="("><mi>x</mi><mi>ξ</mi></mfenced><mi>sin</mi><mfenced close=")" open="("><mrow><mi>m</mi><mi>x</mi></mrow></mfenced></math>