/ / ___\\ / / ___\\ | |1 I*\/ 3 || | |1 I*\/ 3 || | 2*|- - -------|| | 2*|- + -------|| / 2\ | \2 2 /| | \2 2 /| |a + -|*|a - ---------------|*|a - ---------------| \ b/ \ b / \ b /
((a + 2/b)*(a - 2*(1/2 - i*sqrt(3)/2)/b))*(a - 2*(1/2 + i*sqrt(3)/2)/b)
/ 2 2 \ (2 + a*b)*\4 + a *b - 2*a*b/
(2 + a*b)*(4 + a^2*b^2 - 2*a*b)