Răspuns:
n) 2•[(27-7):4-1]-1•5 = 2•[20:4-1]-5 = 2•[5-1]-5 = 2•4-5 = 8-5 = 3
o) 6+2•[(3•25-4•18:9+33)4] = 6+2•[75-8+33):4] = 6+2•[100:4] = 6+2•25 = 6+50 = 56
