Find the difference between two sets, namely ${-2, -3 \pi, -2 e, 0, -4, \frac{33}{7}, -\frac{13}{e}, 6} \setminus {-4, -2 e, -5, -\frac{13}{e}}$.

import math

fst = set((-2, -3*math.pi, -2*math.e, 0, -4, (33/7), -(13/math.e), 6,))
snd = set((-4, -2*math.e, -5, -(13/math.e),))
print(fst - snd)
