Risolvi la seguente espressione

$$\left(2-\frac{2}{3}\right)+\left(\frac{7}{8}-\frac{3}{4}\right)+\left(\frac{9}{4}-1\right)-\frac{5}{6}$$

$$\left(\frac{6-2}{3}\right)+\left(\frac{7-6}{8}\right)+\left(\frac{9-4}{4}\right)-\frac{5}{6}=$$

$$\frac{4}{3}+\frac{1}{8}+\frac{5}{4}-\frac{5}{6}=$$

$$m.c.m.(3;8;4;6)=24$$

$$\frac{32+3+30-20}{24}=$$

$$\frac{45}{24}=$$

$$\frac{15}{8}$$