/ ____________\ / ____________\ / ____________\ / ____________\ | / ____ | | / ____ | | / ____ | | / ____ | \x + \/ 4 - \/ 15 /*\x - \/ 4 - \/ 15 /*\x + \/ 4 + \/ 15 /*\x - \/ 4 + \/ 15 /
(((x + sqrt(4 - sqrt(15)))*(x - sqrt(4 - sqrt(15))))*(x + sqrt(4 + sqrt(15))))*(x - sqrt(4 + sqrt(15)))