3 125 - z
125 - z^3
/ ___\ / ___\ | 5 5*I*\/ 3 | | 5 5*I*\/ 3 | (x - 5)*|x + - + ---------|*|x + - - ---------| \ 2 2 / \ 2 2 /
((x - 5)*(x + 5/2 + 5*i*sqrt(3)/2))*(x + 5/2 - 5*i*sqrt(3)/2)
/ 2 \ -(-5 + z)*\25 + z + 5*z/
-(-5 + z)*(25 + z^2 + 5*z)
125.0 - z^3