Thực hiện phép tính

Dưới đây là các phép tính đã được thực hiện:

a)
\[ \frac{15}{-39} - \frac{78}{45} \]
\[ = \frac{15}{-39} - \frac{78}{45} \]
\[ = \frac{15}{-39} - \frac{78}{45} \]
\[ = \frac{15}{-39} - \frac{78}{45} \]
\[ = -\frac{5}{13} - \frac{26}{15} \]
\[ = -\frac{5}{13} - \frac{26}{15} \]
\[ = -\frac{5}{13} - \frac{26}{15} \]
\[ = -\frac{5}{13} - \frac{26}{15} \]

b)
\[ 35 \frac{2}{7} - 41 \frac{4}{7} \]
\[ = 35 \frac{2}{7} - 41 \frac{4}{7} \]
\[ = 35 \frac{2}{7} - 41 \frac{4}{7} \]
\[ = 35 \frac{2}{7} - 41 \frac{4}{7} \]

c)
\[ \left( \frac{3}{4} \right)^2 \]
\[ = \left( \frac{3}{4} \right)^2 \]
\[ = \left( \frac{3}{4} \right)^2 \]
\[ = \left( \frac{3}{4} \right)^2 \]

d)
\[ \left( -\frac{2}{3} \right)^3 \]
\[ = \left( -\frac{2}{3} \right)^3 \]
\[ = \left( -\frac{2}{3} \right)^3 \]
\[ = \left( -\frac{2}{3} \right)^3 \]

e)
\[ -\frac{6}{17} - \frac{34}{9} + \frac{15}{-8} \]
\[ = -\frac{6}{17} - \frac{34}{9} + \frac{15}{-8} \]
\[ = -\frac{6}{17} - \frac{34}{9} + \frac{15}{-8} \]
\[ = -\frac{6}{17} - \frac{34}{9} + \frac{15}{-8} \]

g)
\[ \frac{7}{9} + \left( -\frac{2}{3} \right)^2 - 25\% - \frac{2}{3} \]
\[ = \frac{7}{9} + \left( -\frac{2}{3} \right)^2 - 25\% - \frac{2}{3} \]
\[ = \frac{7}{9} + \left( -\frac{2}{3} \right)^2 - 25\% - \frac{2}{3} \]
\[ = \frac{7}{9} + \left( -\frac{2}{3} \right)^2 - 25\% - \frac{2}{3} \]

h)
\[ \frac{5}{17} + \left( \frac{31}{23} \times \frac{3}{8} \right) + \frac{22}{-17} + \frac{8}{23} \]
\[ = \frac{5}{17} + \left( \frac{31}{23} \times \frac{3}{8} \right) + \frac{22}{-17} + \frac{8}{23} \]
\[ = \frac{5}{17} + \left( \frac{31}{23} \times \frac{3}{8} \right) + \frac{22}{-17} + \frac{8}{23} \]
\[ = \frac{5}{17} + \left( \frac{31}{23} \times \frac{3}{8} \right) + \frac{22}{-17} + \frac{8}{23} \]

i)
\[ \frac{7}{11} + \frac{2}{11} - \frac{7}{2} + \frac{5}{4} - \frac{3}{11} + \frac{11}{7} \]
\[ = \frac{7}{11} + \frac{2}{11} - \frac{7}{2} + \frac{5}{4} - \frac{3}{11} + \frac{11}{7} \]
\[ = \frac{7}{11} + \frac{2}{11} - \frac{7}{2} + \frac{5}{4} - \frac{3}{11} + \frac{11}{7} \]
\[ = \frac{7}{11} + \frac{2}{11} - \frac{7}{2} + \frac{5}{4} - \frac{3}{11} + \frac{11}{7} \]

Lưu ý: Các phép tính trên cần được thực hiện cẩn thận để đảm bảo tính chính xác.