SEMPLICE MEDIO DIFFICILE

1. 1 $$\left ( 1+\frac{1}{25} \right ):\left \{ \frac{9}{16}-\left [ \left ( \frac{1}{7}+\frac{1}{2} \right )\cdot \frac{4}{3} +\frac{1}{5}\right ]\cdot \frac{1}{8} \right \}+\frac{3}{5}$$
2. 2 $$\frac{5}{3}\cdot \left \{ \left [ \left ( \frac{1}{2}+\frac{1}{3} -\frac{1}{6}\right ) \cdot \left ( \frac{1}{2}+\frac{1}{3}+ \frac{1}{6}\right )+\frac{1}{3}\right ] \cdot \frac{2}{5}-\frac{1}{10}\right \}:\frac{1}{4}$$
3. 3 $$\left ( \frac{1}{2}+\frac{1}{7} -\frac{5}{9}:\frac{25}{18}\right ):\frac{17}{35} +\frac{5}{3}-\left ( \frac{2}{3} -\frac{4}{9}\right )\cdot \frac{3}{2}$$
4. 4 $$\frac{4}{5}-\left \{ \left [ \left ( \frac{3}{5}:3+\frac{1}{7} \right ) \cdot \left ( \frac{3}{2}+\frac{1}{4} \right )-\frac{9}{2}\cdot \frac{1}{15}\right ] :3+\frac{1}{5}\right \}$$
5. 5 $$\frac{14}{15}:\left [ \left ( \frac{3}{4}\cdot \frac{5}{6}-\frac{1}{2} \right ):\frac{3}{4}+\frac{5}{12} \right ]:\left ( \frac{1}{5}-\frac{1}{25} \right )$$
6. 6 $$\left \{ \left ( \frac{2}{5}+\frac{1}{2} \right ).\left [ \left ( 1-\frac{1}{3} \right )\cdot \left ( 1+\frac{1}{5} \right )-\left ( \frac{3}{4} -\frac{2}{5}\right ):\frac{7}{4} \right ]\right \}:\left ( 1+\frac{5}{4} \right )$$