Question

10-{45-30+[25-(40-20)-(14-9)+30(12-15)+25]-3}-7=

Answer 1

10-{45-30+[25-(40-20)-(14-9)+30(12-15)+25]-3}-7

10-{45-30+[25-(20)-(5)+30(-3)+25]-3}-7

10-{45-30+[25-20-5-90+25]-3}-7

10-{45-30+[-65]-3}-7

10-{45-30-65-3}-7

10-{-53}-7

10+53-7=56