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b)42-(-59)-121=42+59-121=-20
c)-24-(-61)-89-(48)=-24+61-89-48=-161+61=-100
d)35-[-43-(35-42)-(-84)]=35-[-43-(-7)+84]=35-[-43+7+84]=35-48=-13
b) 42-(-59)-121 = 101 - 121 = -20
BO - i - daje +
c) -24- (61)* 89- (48) = (-24) - 5429 - 48 = chyba jakiś błąd jest ,do wydzie bardzo dziwna liczba .
d) 35-[ -43-(35-42)-(-84)] = 35-[ -43 -35+42 + 84] = 35 + 43 + 35 - 42 - 84 = -53