Question

-3+{7-[-(5-6)+(4-8)]}

Answer 1

= - 3 + {7 - [ - (5 - 6) + (4 - 8)]}
= - 3 + { 7 - [ - ( - 1) + (-4)]}
= - 3 + { 7 - [ 1 - 4]}
= - 3 + { 7 - [ - 3]}
= - 3 + { 7 + 3}
= - 3 + 10
= 7