[ -2 0 1 ] [ 2 ] 
f(z) = 7/6*z^3 - 25/6*z + 1
*
[ -1 ] [ 0 1 3 ] 
f(z) = -7/24*z^3 + 55/24*z + 1
*
[ 5/3 -1/3 1/3 ] [ 4/3 ] 
f(z) = -21/20*z^3 + 127/60*z + 1
*
[ -12/13 -6/13 -10/13 ] [ -4/13 ] 
-2/13 | 0.15129839413986097928772999763094325177 | 0.028051324055956008278392545053153074568
f(z) = -169/48*z^3 + 55/12*z + 1
*
TOTAL: 4