For all complex numbers z,
let f(z) = z^2 if z is not real, f(z) = 2z if z is real.
Find f(f(f(f(1+i)))).
f(f(f(f(1+i))))
f(1+i) = 2i
f(2i) = -4
f(-4) = -8
f(-8) = -16
=^._.^=
