1. D
-5<a< 4
=>a={-4;-3;-2;-1;0;1;2;3}
=>-4-3-2-1+0+1+2+3
=>(-3+3)+(-2+2)+(-1+1)+0-4
=0+0+0+0-4
=-4
2.C
(-1)^3.(-2)^3
=(-1).(-8)
=8
3. B,C,D
A,(-3)-(4-6)=1
,(-3)-(4-6)
=-3-(-2)
=-3+2
=-1
B,(-3)-(4-6)=-5
(-3)-(4-6)
=-3-(4-6)
=-3-(-2)
=-3+2
=1
C. 52-(48-52)+48=0
52-(48-52)+48
=52-(-4)+48
=52+48+48
=104
D.-52-(48-52)-48=0
=-52-(-4)-48=0
=-52+4-48
=-48-48
=-96