[ -5/21 ] [ 5/7 -1/21 ] [ -3/7 ] [ 2/3 ] 
-11/21 |-> -1/21
-4/21 |-> -1/21
-10/21 | 0.089414907341935353372604097661775117158 | 0.014684553845626506296305722430551799247
f(z) = -147/10*z^3 + 181/30*z + 1
*
TOTAL: 1