/ ____________\ / ____________\ / ____________\ / ____________\ | / ____ | | / ____ | | / ____ | | / ____ | \x + I*\/ 4 - \/ 13 /*\x - I*\/ 4 - \/ 13 /*\x + I*\/ 4 + \/ 13 /*\x - I*\/ 4 + \/ 13 /
(((x + i*sqrt(4 - sqrt(13)))*(x - i*sqrt(4 - sqrt(13))))*(x + i*sqrt(4 + sqrt(13))))*(x - i*sqrt(4 + sqrt(13)))