Find the union of the following sets, namely ${-7, 7, -8, \frac{19}{5}, -\frac{1}{\pi }} \cup {-\frac{1}{\pi }, -8, -7.68, 3, -7, 7, 4}$.
Answer:
${-8, -7.68, -7, -\frac{1}{\pi }, 3, \frac{19}{5}, 4, 7}$
{'source': 'AMPS', 'file': 'amps/mathematica/counting_and_statistics/set_union/30759.txt'}