(0,064)^{-\frac{1}{3}} -(-0,2)^{-2}*16^{-0,25}+ (1\frac{7}{9})^{\frac{1}{2}}=
=(\frac{64}{1000})^{-\frac{1}{3}}-(-\frac{1}{5})^{-2}*(2^4)^{-\frac{1}{4}}+(\frac{16}{9})^{\frac{1}{2}}=
=((\frac{4}{10})^3)^{-\frac{1}{3}}-(-5)^2*2^{-1}+((\frac{4}{3})^2)^{\frac{1}{2}}=
=(\frac{2}{5})^{-1}-25*\frac{1}{2}+\frac{4}{3}=\frac{5}{2}-\frac{25}{2}+\frac{4}{3}=
=-\frac{20}{2}+\frac{4}{3}=-10+\frac{4}{3}=-\frac{30}{3}+\frac{4}{3}=-\frac{26}{3}=-8\frac{2}{3}