Решение:
- 1. \( m + (a + 4) \) = \( m + a + 4 \)
- 2. \( 3 \cdot (5x - 8) + 10x - 12 \) = \( 15x - 24 + 10x - 12 \) = \( 25x - 36 \)
- 3. \( -4 \cdot (-2x + 10) + (6x - 8) \) = \( 8x - 40 + 6x - 8 \) = \( 14x - 48 \)
- 4. \( -7 \cdot (-2x - 5) - (4x + 10) \) = \( 14x + 35 - 4x - 10 \) = \( 10x + 25 \)
Ответ: 1. m + a + 4; 2. 25x - 36; 3. 14x - 48; 4. 10x + 25