[tex]B=\frac{1}{4}+\frac{5}{3}*\frac{-1}{8} C=\frac{4}{-3} +\frac{-7}{6}*\frac{-2}{5} D=(\frac{8}{15}-\frac{7}{5})*(\frac{-1}{6}+\frac{2}{9})[/tex]