75-72+64-56+18+68-67

Решение:

\( 75 - 72 + 64 - 56 + 18 + 68 - 67 \)

1. \( 75 - 72 = 3 \)
2. \( 3 + 64 = 67 \)
3. \( 67 - 56 = 11 \)
4. \( 11 + 18 = 29 \)
5. \( 29 + 68 = 97 \)
6. \( 97 - 67 = 30 \)

Ответ: 30