Răspuns:
[tex](2n + 2 + 2n + 1 + 2n) \div 2n - 5 \\ (6n + 2 + 1) \div 2 \times n - 5 \\ (6n + 3) \div 2 \times n - 5 \\ \frac{6n + 3}{2} \times n - 5 \\ \\ \frac{6n + 3}{2} - 5[/tex]
