\( = 8 \cdot 2 + 9 + 25 + 21 - 3 \)
\( = 16 + 9 + 25 + 21 - 3 \)
\( = 25 + 25 + 21 - 3 \)
\( = 50 + 21 - 3 \)
\( = 71 - 3 = 68 \)
\( = 17 + 8 \cdot 4 - 9 \cdot 2 \)
\( = 17 + 32 - 18 \)
\( = 49 - 18 = 31 \)
\( = 2 \cdot 8 : 4 + 5 - 5 - 4 \cdot 7 + 4 \cdot 7 \)
\( = 16 : 4 + 5 - 5 - 28 + 28 \)
\( = 4 + 0 + 0 = 4 \)
Ответ: 68, 31, 4.