[tex]ex 4 \frac{3}{3} \frac{3}{2} \frac{3}{1} \frac{2}{3} \frac{2}{2} \frac{2}{1} \frac{1}{3} \frac{1}{2} \frac{1}{1} \\ ex5 \frac{7}{3} \frac{9}{6} \frac{14}{2} \: \: \: \: \: \: \frac{1}{2} \frac{8}{13} \frac{2}{5} \frac{4}{7} \: \: \: \: \: \: \: \: \: daca \: acolo \: scrie \: si \: eciunitare \: ele \: sunt \: cele \: rmase \\ [/tex]
