Question

efectua eliminando los parentesis
-[(6-3)-(12+4)]-(8+3)=
-[(+4)-(-3)-(+6)+(-4)]=
-[(-5)-(7-12+9)+2]=

Answer 1

-[(6-3)-(12+4)]-(8+3)=
-[3-16]-11
-3+16-11
-14+16
=2

-[(+4)-(-3)-(+6)+(-4)]=
-(+4+3-6-4)
-4-3+6+4
-7+10
=3

-[(-5)-(7-12+9)+2]=
-[-5-(4)+2]
-[-5-4+2]
5+4-2
9-2
=7

Answer 2

[(6-3)-(12+4)]-(8+3)=
-[3-16]-11
-3+16-11
-14+16
=2

-[(+4)-(-3)-(+6)+(-4)]=
-(+4+3-6-4)
-4-3+6+4
-7+10
=3

-[(-5)-(7-12+9)+2]=
-[-5-(4)+2]
-[-5-4+2]
5+4-2
9-2
=7