Find the difference between two sets, namely ${8.425, 6 \sqrt{2}, 0, 4.3, \frac{20}{e}, 9} \setminus {0, 4.3, -1}$.

import math

fst = set((8.425, 6*math.sqrt(2), 0, 4.3, (20/math.e), 9,))
snd = set((0, 4.3, -1,))
print(fst - snd)
