Question

calcule as expressões: 5)-1+[-(-2+4-5)-3]=

6)-4+3-[+(-2+5)-3]=

7)[-(-2)-(-3)-5]-4=

Answer 1

5) -1+[-(2+4-5)-3]=
-1+[-1-3]
-1+-4
-5
6)-4+3-[+(-2+5)-3]=
-4+3-[+3-3]
-4+3-0
-1
7)[-(-2)-(-3)-5]-4=
[--2--3-5]-4
0-4
4