x 0 0 a
0 x 1/3 a
-x -x 2/3 a
-x 0 1/2 a
0 -x 5/6 a
x x 1/6 a
x 2*x 1/4 b
-2*x -x 7/12 b
x -x 11/12 b
-x -2*x 3/4 b
2*x x 1/12 b
-x x 5/12 b
x y z c
-y x-y z+1/3 c
-x+y -x z+2/3 c
-x -y z+1/2 c
y -x+y z+5/6 c
x-y x z+1/6 c
y x -z+1/3 c
x-y -y -z c
-x -x+y -z+2/3 c
-y -x -z+5/6 c
-x+y y -z+1/2 c
x x-y -z+1/6 c