Find the difference between two sets, namely ${3, \sqrt{5}, -1, 2, -3, 6.504} \setminus {-4.866, 9, 2}$.

import math

fst = set((3, math.sqrt(5), -1, 2, -3, 6.504,))
snd = set((-4.866, 9, 2,))
print(fst - snd)
