Условие:

100840
100470
8024 + 6
6018 + 7
90 − (60 + 24)
80 − (7012)

100840 = 100408 = 608 = 52
100470 = 100704 = 304 = 26
8024 + 6 = 80 − (20 + 4) + 6 = (8020) − 4 + 6 = 604 + 6 = 56 + 6 = 62
6018 + 7 = 60 − (10 + 8) + 7 = (6010) − 8 + 7 = 508 + 7 = 42 + 7 = 49
90 − (60 + 24) = 9084 = 90 − (80 + 4) = (9080) − 4 = 104 = 6
80 − (7012) = (8070) + 12 = 10 + 12 = 22