[tex]\it a)\ \ -\dfrac{4}{3}\cdot\bigg(-\dfrac{5}{8}+\dfrac{^{2)}1}{\ \ 4}\bigg)=-\dfrac{4}{3}\cdot\dfrac{-5+2}{8}=-\dfrac{4}{3}\cdot\dfrac{-3}{8}=\dfrac{\ \ 12^{(12}}{24}=\dfrac{1}{2}[/tex]
[tex]\it a)\ \ -\dfrac{4}{3}\cdot\bigg(-\dfrac{5}{8}+\dfrac{1}{4}\bigg)=\dfrac{\not4}{3}\cdot\dfrac{5}{\not8\ _2}-\dfrac{\not4}{3}\cdot\dfrac{1}{\not4}=\dfrac{5}{6}-\dfrac{^{2)}1}{\ \ 3}=\dfrac{\ \ 3^{(3}}{6}=\dfrac{1}{2}[/tex]