a, b, c, d, u, v, w, x, y, z, 
210*z-210
-80*d+180*y+855*z
136*d*z-114*c+152*x+720*y
105*c*z+112*d*y-144*b+126*w+595*x
78*b*z+84*c*y+90*d*x-170*a+102*v+480*w
55*a*z+60*b*y+65*c*x+70*d*w+80*u+375*v
40*a*y+44*b*x+48*c*w+52*d*v+280*u
27*a*x+20*b*w+33*c*v+36*d*u
16*a*w+18*b*v+20*c*u
7*a*v+8*b*u
