Условие:

9 + 68;
7 + 56;
32 − (24 + 6);
49 − (33 + 6);
28 + 37 + 2 + 3;
64 + 18 + 2 + 6.

9 + 68 = 158 = 7;
7 + 56 = 126 = 6;
32 − (24 + 6) = 3230 = 2;
49 − (33 + 6) = 4939 = 10;
28 + 37 + 2 + 3 = (28 + 2) + (37 + 3) = 30 + 40 = 70;
64 + 18 + 2 + 6 = (64 + 6) + (18 + 2) = 70 + 20 = 90.