10+1+2-3, 50, 20, 30, 10, 21+7-2+1, 23, 27, 25, 72, 30+3-1+5, 30, 37, 40, 32, 47-2+4-9, 40, 41, 47, 52, 44+5-4+1, 45, 46, 43, 42, 62-1+5-6, 62, 71, 65, 60, 45+4-2-1, 47, 46, 43, 45, 76-5+6-7, 80, 50, 60, 70, 64-3-1+3, 63, 62, 60, 64, 72+6-7+8, 78, 79, 72, 73.

Direct Method Exercise 3

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