Which of the following expressions is equivalent to 3 + 3 • 12 ÷ 4 • 3?

1. 3 + 36 ÷ 4 • 3
2. 6 • 12 ÷ 4 • 3
3. 3 + 3 • 12 ÷ 12
4. 3 + 3 • 3 • 3