Order of operations

Do you remember order of operations?
1º: Parentheses,
2º: Exponents,
3º: Multiplication & Division,
4º: Addition & Subtraction

Calculate:

a) 13 - 5 · 2 + 6 =
b) (13 - 5) · (2 + 6) =
c) 3² x 4³ =
d) 9 x (5 + 3)² - 144 =
e) (3 + 2 ·(16 - 3·4) - 7) · 5 =