Question

45-{2-[5+4+(6-2)-(7+3-9)+6]-7}+8

Answer 1

45-{2-[5+4+(6-2)-(7+3-9)+6]-7}+8 =
45 - { 2 - [9+ (4) - (1) + 6] -7} + 8 =
45 - { 2 - [13 - 7] -7} + 8 =
45 - {2 - 6 - 7} + 8 =
45 - {-11} + 8 =
45 + 11 + 8 =
64

Answer 2

45-{2[5+4+4-1+6]-7}+8
45-{2+17-7}+8
45-12+8=41