1) c × (4c - 8) - (c - 2) × c - 5, при c = 3;
3 × (4 × 4 - 8) - (3 - 2) × 3 - 5 = 3 × 8 - 1 × (-2) = 24 - (-2) = 24 + 2 = 26.
Ответ: 26.
2) 25 × (t × 4) × 100, при t=593;
25 × (593 × 4) × 100 = 25 × 2372 × 100 = 59300 × 100 = 5930000.
Ответ: 5930000.