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rezolva ,respectand regulile invatate.
c] 91-[88+[(50-72;9):6]:5


Răspuns :

91-[88+[(50-8):6]:5=
91-(88+42:6):5=
91-(88+7):5=
91-95:5=
91-19=
72
91-[88+[(50-8):6]:5=
91-[88+[42:6]:5=
91-[88+7]:5=
91-95:5=
91-19=
72