a) $\frac{5}{2}$ ³=$\frac{125}{8}$
b) $\frac{-4}{9}$²=$\frac{16}{81}$
c) (-1$\frac{3}{5}$)$^{4}$=($\frac{-8}{5}$)$^{4}$ =$\frac{4096}{625}$
d) $(0,6)^{1}$+($\frac{2}{3}$)$^{4}$ ÷($\frac{2}{3}$)$^{3}$
= $\frac{3}{5}$+$\frac{2}{3}$
= $\frac{9}{15}$+$\frac{10}{15}$
= $\frac{19}{15}$