1) 359 ⋅ a + 641 ⋅ 17, якщо a = 17;
359 ⋅ 17 + 641 ⋅ 17 = 17(359 + 641) = 17 ⋅ 1000 = 17000
2) 769 ⋅ b - 87 ⋅ b, якщо b = 369
769 ⋅ 369 - 87 ⋅ 369 = 369(769 - 87) = 369 ⋅ 682 = 251658
Відповідь: 1) 17000; 2) 251658