[ 1/6 ] [ -1/6 ] [ 5/6 -5/6 ] [ 0 ]
-2/3 |-> 1/6
2/3 |-> -1/6
-1/2 |-> -1/6
1/2 |-> 1/6
f(z) = -3*z^3 + 13/12*z
*
[ -17/10 ] [ 17/10 ] [ 13/10 -13/10 ] [ 0 ]
-6/5 |-> 17/10
6/5 |-> -17/10
-1/2 |-> 17/10
1/2 |-> -17/10
f(z) = 5/3*z^3 - 229/60*z
*
TOTAL: 2