5 x - 3*x
x^5 - 3*x
/ 4\ x*\-3 + x /
x*(-3 + x^4)
/ 4 ___\ / 4 ___\ / 4 ___\ / 4 ___\ x*\x + \/ 3 /*\x - \/ 3 /*\x + I*\/ 3 /*\x - I*\/ 3 /
(((x*(x + 3^(1/4)))*(x - 3^(1/4)))*(x + i*3^(1/4)))*(x - i*3^(1/4))
x^5 - 3.0*x