Funky Mathlangs (Was: We Z'te)

I've come up with a small funky mathlang of my own, à la We Z'te.
Let's see how you guys/gals do.

a z z
a y y
a x x

b z y
b z x
b y x

a a z z c

a a z x d

a e d d d
a e c d c
a e d c c
a e c c c

a f d d d
a f c d d
a f d c c
a f c c c

a g d d d
a g c d c
a g d c c
a g c c d

Have fun.