https://learn.microsoft.com/en-us/dotnet/api/documentformat.openxml.math.mathproperties?view=openxml-2.8.1
MathProperties Class (DocumentFormat.OpenXml.Math) | Microsoft Learn
Math Properties. This class is available in Office 2007 and above. When the object is serialized out as xml, it's qualified name is m:mathPr.
classopenxmlmathmicrosoftlearn