a)
\[
124301 - (73645 + 83408) - 792 = 124301 - 157053 - 792 = -33544
\]
б)
\[
9935 + 203515 : (39635 - 72 \cdot 507) = 9935 + 203515 : (39635 - 36504) = 9935 + 203515 : 3131 = 9935 + 65.0007984669 = 9935 + 65 = 10000
\]
в)
\[
17.36 \cdot 6.88 - 5.36 \cdot 6.88 + 17.36 \cdot 3.12 - 8.36 \cdot 3.12 = 6.88 \cdot (17.36 - 5.36) + 3.12 \cdot (17.36 - 8.36) = 6.88 \cdot 12 + 3.12 \cdot 9 = 82.56 + 28.08 = 110.64
\]
г)
\[
(10.5 : 1.4 - 0.12) : 0.012 + 1.6 \cdot (0.548 - 0.023) = (7.5 - 0.12) : 0.012 + 1.6 \cdot 0.525 = 7.38 : 0.012 + 0.84 = 615 + 0.84 = 615.84
\]
Ответы:
a) -33544
б) 10000
в) 110.64
г) 615.84