I'll solve each of the exercises presented in the image, expressing the answers as fractions in their lowest terms.

Solutions

1. $\frac{1}{12} + \frac{3}{2} + \frac{2}{6} = \frac{1}{12} + \frac{18}{12} + \frac{4}{12} = \frac{23}{12}$ or $1 \frac{11}{12}$
2. $\frac{5}{8} - \frac{1}{6} - \frac{3}{2} = \frac{15}{24} - \frac{4}{24} - \frac{36}{24} = -\frac{25}{24}$ or $-1 \frac{1}{24}$
3. $2 \frac{2}{5} + \frac{1}{10} + \frac{5}{6} = \frac{12}{5} + \frac{1}{10} + \frac{5}{6} = \frac{601}{30} = 20 \frac{1}{30}$
4. ( \frac{7}{8} + 8 + \frac{9}{10} + \frac{3}{4} = \frac{7}{8} + \frac{80}{8} + \frac{72}{80} + \frac{3