27^{\frac{5}{3}}+0,008^{\frac{1}{3}}+0,064^{-\frac{2}{3}}=
=\sqrt[3]{27^5}+\sqrt[3]{0,008}+(\frac{1000}{64})^{\frac{2}{3}}=
=\sqrt[3]{27^3*27*27}+0,2+\s\sqrt[3]{(\frac{1000}{64})^2}=
=27*\sqrt[3]{729}+0,2+(\frac{10}{4})^2=
=27*9+0,2+2,5^2=
=243,2+6,25=249,45