/ _______________ \ / _______________ \ / _______________\ | / ____ / ___\| | / ____ / ___\| | / ____ | | / 25 3*\/ 69 | 1 I*\/ 3 || | / 25 3*\/ 69 | 1 I*\/ 3 || | / 25 3*\/ 69 | / ___\ / ___\ | 3 / -- + -------- *|- - - -------|| | 3 / -- + -------- *|- - + -------|| | 3 / -- + -------- | | 1 I*\/ 3 | | 1 I*\/ 3 | | 1 1 \/ 2 2 \ 2 2 /| | 1 1 \/ 2 2 \ 2 2 /| | 1 1 \/ 2 2 | |a + - + -------|*|a + - - -------|*|a + - - + -------------------------------------- + ------------------------------------|*|a + - - + -------------------------------------- + ------------------------------------|*|a + - - + ---------------------- + --------------------| \ 2 2 / \ 2 2 / | 3 _______________ 3 | | 3 _______________ 3 | | 3 _______________ 3 | | / ___\ / ____ | | / ___\ / ____ | | / ____ | | | 1 I*\/ 3 | / 25 3*\/ 69 | | | 1 I*\/ 3 | / 25 3*\/ 69 | | / 25 3*\/ 69 | | 3*|- - - -------|*3 / -- + -------- | | 3*|- - + -------|*3 / -- + -------- | | 3*3 / -- + -------- | \ \ 2 2 / \/ 2 2 / \ \ 2 2 / \/ 2 2 / \ \/ 2 2 /
((((a + 1/2 + i*sqrt(3)/2)*(a + 1/2 - i*sqrt(3)/2))*(a - 1/3 + 1/(3*(-1/2 - i*sqrt(3)/2)*(25/2 + 3*sqrt(69)/2)^(1/3)) + (25/2 + 3*sqrt(69)/2)^(1/3)*(-1/2 - i*sqrt(3)/2)/3))*(a - 1/3 + 1/(3*(-1/2 + i*sqrt(3)/2)*(25/2 + 3*sqrt(69)/2)^(1/3)) + (25/2 + 3*sqrt(69)/2)^(1/3)*(-1/2 + i*sqrt(3)/2)/3))*(a - 1/3 + 1/(3*(25/2 + 3*sqrt(69)/2)^(1/3)) + (25/2 + 3*sqrt(69)/2)^(1/3)/3)