Where to include unique math background in application?

My D grouped all of her AoPS, AMC/AIME, PuMAC, HMMT, ARML, etc. into one Activity. I think “six AoPS courses” was as detailed as she got, and is probably sufficient.

I don’t think including a pre-Algebra, Algebra, Geometry transcript would be valuable, assuming you have Calc and other classes on your actual HS transcript.