Question

1.     1 + { 3 + 5 - 8 + 6 - [ 23 + 45 - 66
+ 23 - ( 3 + 5 + 7 ) - 67 ] + 8 }

 

Answer 1

1+{ 3+5 -8+6 - [ 23 +45 -66 +23 -(3+5+7)-67] + 8}
1 +{6-[ 25-(15) -67] +8}
1 +{6 - [25 -15 -67] +8}
1+ { 6 - [ -57] +8}
1 +{6+57 +8}
1+71 =72