A -8-15+16= -7
B 19+24+31=74
C 35+18+21= 74
D -17-21+19-10= -29
E 21+35+60-42= 74
F 8+[-(13-5)+12]+6
8+[-8+12]+6
8+4+6
18
G. [ 9+(-4)]-[-32+(-5+4)]+6
[9-4]-[-32-1]+6
5-[33]+6
5-33+6
-22
H. 17-[4+(-3+5)-(-8+7)+3]10
17-[4+2-(-1)+3]+10
17-[9+1]+10
17-8+10
19
J. 55-{11+[-15-(-8)]-21]}-(7-(-11))
55-{11+[-15+8]-21}-(7+11)
55-{11-7-21}-18
55-{-18}-18
55+18-18
55