A = -2 + ( -5 + 3 ) + 7
=-2-2+7
=-4+7
=3
F = -4 - 8 ( -8 ) + 2
=-4+64+2
=-2+66
=64
I = 5- ( - 7 + 2 ) - 9
=5-(-5)-9
=5+5-9
=10-9
=1
N = - 9 ( +3 ) - 4
=-27-4
=-31
R = - 4 + 5 - ( 2 - 8 ) - 9
=-4+5-(-6)-9
=1+6-9
=7-9
=-2
T = 3 - ( - 4 ) - ( 15 )
=3+4-15
=7-15
=-8
E = 12 - ( -2 ) - ( -1 )
=12+2+1
=15
G = 7 - ( - 11 ) - ( - 3 )
=7+11+3
=21
L = 2 - ( -8 + 15 ) - ( 5 )
=2-(+7)-5
=2-7+5
=-5+5
=0
P = - 9 - ( + 5 ) - ( +8 )
=-9-5-8
=-22
S = -8 + ( +6 ) + ( -2 + 9 )
=-8+6+7
=-1+6
=5
U = - 5 - ( - 7 ) - ( - 9 )
=-5+7+9
=2+9
=11