assert eval('1+1') == 2
assert eval('[1,2,3]') == [1,2,3]

# some bugs here
# def f(x):
#     return eval('x')

# assert f(1) == 1


# a = 0
# assert eval('a') == 0

# exec('a = 1')
# assert a == 1

# def f(x):
#     exec('a = x')
#     return a

# assert f(2) == 2

# exec(
#     "exec('a = eval(\"3 + 5\")')"
# )
# assert a == 8

# def f():
#     b = 1
#     exec(
#         "exec('b = eval(\"3 + 5\")')"
#     )
#     assert b == 8