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