28 Calculaţi:
a 11+{-15 +(+5 - 12+(-8 - 13) - (-5 - 18 - 2)] +8};
b [(-7 +3 - 13) – (4 – 14 – 5) – (+8)] – [10+(-6) - (-24 +28) – (-16)].
VA ROGGGG!!! REPEDEEE!!!DAU COROANA !!!!​