3-17+5+(35-19)-57-20

Решение:

\( 3 - 17 + 5 + (35 - 19) - 57 - 20 \)

1. \( 35 - 19 = 16 \)
2. \( 3 - 17 = -14 \)
3. \( -14 + 5 = -9 \)
4. \( -9 + 16 = 7 \)
5. \( 7 - 57 = -50 \)
6. \( -50 - 20 = -70 \)

Ответ: -70