2-{3+5-[-12+5-(-3+7)-12]+32]
= 2-{3+5-[-12+5- 4 -12]+32]
=2-{3+5-[-7- 4 -12]+32]
= 2-{3+5-[-11 -12]+32]
= 2-{3+5-1+32]
= 2-{8-1+32]
=2-{7+32]
=2-32
=-30
2-{3+5-[-12+5-(-3+7)-12]+32 =2-{3+5-[-12+5+3-7-12]+32} =2-{3+5+12-5-3+7+12+32} =2-{(3-3)+(5-5)+(12+12+7+32)} =2-{0+63}=2-63=-61
2-{3+5-[-12+5-(-3+7)-12]+32}
=2-{8-[-12+5-4-12]+32}
=2-{8-[(-12+5)-4-12]+32}
=2-{8-[-7-4-12]+32}
=2-{8-[(-7-4)-12]+32}
=2-{8-[-11-12]+32}
=2-{8-(-23)+32}
=2-{[8-(-23)]+32}
=2-{31+32}
=2-63
=-61