print("Un string:", "4" + "2")                 # Un string: 42
print("Un numar:", 4 % 3 + int("41"))          # Un numar: 42
print("Un string:", "4" + str(2))              # Un string: 42
print('persoana %s are %d ani' % ("X", 42))    # persoana X are 42 ani
print((2.0 + 3.0j) * (2.1  -6.0j))             # (22.2-5.7j)
print(2 ** 3 ** 2)                             # 512