40+50-20-50+60+10-20, 50, 40, 30, 70, 10+30+50-10-50-30+60, 80, 60, 50, 70, 50+30-20+30-50-20+60, 30, 90, 80, 70, 40+50-90+50+10+30-50, 40, 50, 70, 80, 90-30+20-50+10+50-70, 30, 20, 50, 60, 20+60+10-80+30-10+50, 50, 70, 80, 60, 50+20+10-30+40-60-10, 10, 20, 30, 40, 60+20-50+60-30-50+60, 80, 50, 60, 70.

Direct Method Exercise 2

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