Đề bài

Tính:

a)${\left( {\frac{2}{5} + \frac{1}{2}} \right)^2}$;                 b)${\left( {0,75 - 1\frac{1}{2}} \right)^3};$

c)${\left( {\frac{3}{5}} \right)^{15}}:{\left( {0,36} \right)^5}$;         d)${\left( {1 - \frac{1}{3}} \right)^8}:{\left( {\frac{4}{9}} \right)^3}$