These can be captured under several headings:
XA. Logic; Elements of Argument
XF. Functions [different type of equation; can be many of the types of equation, using the same notation] [Many types of function -- such as those identified in the SUMO ontology can be captured synthetically.]
XM. Matrices: Cutter numbers might be used for various types.
XU. Surfaces [there is a lot of different types of these, used almost entirely within math. There appear to be a handful of main types; Cutter numbers could be employed thereafter.]
XY. Systems [This fits here better than anywhere else.]