If '+' represents addition, '-' represents subtraction, '×' represents multiplication, and '÷' represents division, what is the value of 8 ÷ 2 × 4 + 6 - 3?
If '?' represents subtraction, '?' represents addition, '?' represents multiplication, and '?' represents division, what is the value of 12 ? 4 ? 2 ? 3 ? 1?
If '+' represents addition, '-' represents subtraction, '×' represents multiplication, and '÷' represents division, what is the value of 8 ÷ 2 + 3 × 4?