Question

(2,2-4pe5)*1 3pe7*(5,2-2 2pe5)+4pe5;

Answer 1

$(2.2 - \frac{4}{5} ) \times 1 \frac{3}{7} \times (5.2 - 2 \frac{2}{5} ) + \frac{4}{5} = \\ ( \frac{11}{5} - \frac{4}{5} ) \times \frac{10}{7} \times ( \frac{26}{5} - \frac{12}{5} ) \\ \frac{7}{5} \times \frac{10}{7} \times \frac{14}{5} = \frac{28}{5}$