Find the union of the following sets, namely ${-3, 4 \sqrt{5}, 7, 3} \cup {-3, -7, 3, 4 \sqrt{5}}$.

import math

fst = set((-3, 4*math.sqrt(5), 7, 3,))
snd = set((-3, -7, 3, 4*math.sqrt(5),))
print(fst.union(snd))
