If ‘-’ means ‘+’, ‘+’ means ‘-’, ‘*’ means ‘÷’ and ‘÷’ means ‘*’ then which of the following will be the correct equation?

1. 10 + 5 - 14 ÷ 10 * 15 = 158
2. 30 + 5 + 14 - 10 * 15 = 122
3. 30 - 5 + 14 ÷ 10 * 15 = 162
4. 30 * 5 - 4 ÷ 10 + 15 = 31