Какой порядок вычисления в Python?

>>> def f():
...     a = 10
...     b = 2
...     c = 3
...     d = 6
...     e = a - b + c - d
...
>>> from dis import dis
>>> dis(f)
  2           0 LOAD_CONST               1 (10)
              2 STORE_FAST               0 (a)

  3           4 LOAD_CONST               2 (2)
              6 STORE_FAST               1 (b)

  4           8 LOAD_CONST               3 (3)
             10 STORE_FAST               2 (c)

  5          12 LOAD_CONST               4 (6)
             14 STORE_FAST               3 (d)

  6          16 LOAD_FAST                0 (a)
             18 LOAD_FAST                1 (b)
             20 BINARY_SUBTRACT
             22 LOAD_FAST                2 (c)
             24 BINARY_ADD
             26 LOAD_FAST                3 (d)
             28 BINARY_SUBTRACT
             30 STORE_FAST               4 (e)
             32 LOAD_CONST               0 (None)
             34 RETURN_VALUE

>>> def f2():
...     a = 10
...     b = 3
...     c = 5
...     d = 6
...     e = a + b / c * d
...
>>> dis(f2)
  2           0 LOAD_CONST               1 (10)
              2 STORE_FAST               0 (a)

  3           4 LOAD_CONST               2 (3)
              6 STORE_FAST               1 (b)

  4           8 LOAD_CONST               3 (5)
             10 STORE_FAST               2 (c)

  5          12 LOAD_CONST               4 (6)
             14 STORE_FAST               3 (d)

  6          16 LOAD_FAST                0 (a)
             18 LOAD_FAST                1 (b)
             20 LOAD_FAST                2 (c)
             22 BINARY_TRUE_DIVIDE
             24 LOAD_FAST                3 (d)
             26 BINARY_MULTIPLY
             28 BINARY_ADD
             30 STORE_FAST               4 (e)
             32 LOAD_CONST               0 (None)
             34 RETURN_VALUE