(2) Resolva as expressōes numéricas , aplicando as regras de s a) -9+7= __ b) +4+6=underline ( ) c) +12+(-12)=underline ( ) d) -7-(+10)=underline ( ) e) bigcirc +(-8)=underline ( ) f) -(-15)-(-16)=underline ( ) g) -11-9=underline ( ) h) -(-18)+(-22)=underline ( ) i) 12-(-4)+(-7)= __ j) -7+(+10)-(+5)=underline ( ) k) -22+(+15)+(-8)-(-16)-(+13)=underline ( ) 1) -(10+8)+(-15+33)-(-1+8)-(-17+10)=underline ( )

a) b) c) d) e) (Note: The symbol is not defined in the question, so the answer cannot be determined.)f) g) h) i) j) k) l)