I only have one Maths...maybe soon two. While I don't have the money to shell out for a whole rack of Maths, man would I want to play with such a thing. Could probably have 2-4 at audio rates (I suppose 2 if you don't have a mixer), and the rest LFOs and LFOs modulating other LFOs. I dunno...give me the rack and I'll give you some patches
The Maths can be pressed into being a four channel mixer if you set channels 1 and 4 to a neutral setting then take the mix output. Maths can cycle into audio frequency range. If you modulate either of the slopes the rate will speed up or slow down (change pitch).