👤

C. Calculaţi:
8 3
1. 5+(-7)-(-4)-(-6)=
2. -4+(-2)+3-(-5+7-9+1)=
3. 7-(-13+25+4)-(8+13-25)-(-5-3)=
4. 13-(5-17)-(3-10-9+12)-(3-18)=
5.-12-(-14+18-9)-(8-15-5)-(+6+5)=
6. (7+15-28)+(-15+21)-(13-19)=
7. (-8-15+20)-(3+9-7)-(-15+23)=