3+2(4)-3+4(-3)=

I got 4

3+4-2-5+3-6-8=
I got -17

4-3(2+6) =
I got. -21

10/5 + 8+(-3) /5 -4=
I got -1

For. 1. I got. -4

For 2. I can't figure out

For. 3. I got. -20

For 4. Igot -1