/ / ___\\ / / ___\\ | | 1 I*\/ 3 || | | 1 I*\/ 3 || | 3*|- - - -------|| | 3*|- - + -------|| / 3\ | \ 2 2 /| | \ 2 2 /| |a - -|*|a - -----------------|*|a - -----------------| \ b/ \ b / \ b /
((a - 3/b)*(a - 3*(-1/2 - i*sqrt(3)/2)/b))*(a - 3*(-1/2 + i*sqrt(3)/2)/b)
/ 2 2 \ -(-3 + a*b)*\9 + a *b + 3*a*b/
-(-3 + a*b)*(9 + a^2*b^2 + 3*a*b)