2 (a - 4) + a*(a + 8)
(a - 1*4)^2 + a*(a + 8)
/ ___\ / ___\ 1*\a + 2*I*\/ 2 /*\a - 2*I*\/ 2 /
(1*(a + 2*i*sqrt(2)))*(a - 2*i*sqrt(2))
2 16 + 2*a
16 + 2*a^2
16.0*(-1 + 0.25*a)^2 + a*(8.0 + a)
2 2 a + (-4 + a) + 8*a
a^2 + (-4 + a)^2 + 8*a