1) 83 × (4637 + 1289) - (19204 + 43 853) = 83 × 5926 - 63057 = 491858 - 63057 = 428801
2) (69 701 - 69 007) × 75 + (36 431 - 27 443) = 694 × 75 + 8988 = 52050 + 8988 = 61038
Ответ: 1) 428801; 2) 61038