Thực hiện phép tính

Thực hiện phép tính:
$\frac{-27}{16}\times \frac{4}{9}\times \frac{5}{-7}\times \frac{14}{15}$
$\frac{3}{17}+\frac{-5}{13}+\frac{-18}{35}+\frac{14}{17}+\frac{17}{-35}+\frac{-8}{13}$

$\frac{5}{9}\times \frac{7}{13}+\frac{5}{9}\times \frac{9}{13}-\frac{5}{9}\times \frac{3}{13}$
$50\%\times 1\frac{1}{3}\times 10\times \frac{7}{35}\times 0.75$