a) (-27+43)-{[(-30+24)-(-18+25)]-(-37+53)}= 81
b) (-33+49)-{[(-42+50)-(-24+35)]-(-29+34)}= 24
c) (-28+41)+[9-(-42+51)+(17-25+33)]= 38
d) (37-48)+[12-(-21+33)+(43-37-11)]= -16
e) (-35+(-21-7+24)-(15-27+19)+34]-(+73)= -85
f) [-60+(32-43)-(-24 +15)-(+33)]+(-34+49)= -80
Sper că te-am ajutat! Succese :))