3 2 z - 3*z + z + 5
z^3 - 3*z^2 + z + 5
(x + 1)*(x + -2 + I)*(x + -2 - I)
((x + 1)*(x - 2 + i))*(x - 2 - i)
3 2 5 + z + z - 3*z
5 + z + z^3 - 3*z^2
5.0 + z + z^3 - 3.0*z^2
5 + z*(1 + z*(-3 + z))
/ 2 \ (1 + z)*\5 + z - 4*z/
(1 + z)*(5 + z^2 - 4*z)