[tex]a) \ 27^{3}:9^{3} = (27:9)^{3} = 3^{3} = 27\\\\\\b) \ (2\frac{1}{2})^{10}\cdot(\frac{2}{5})^{10} = (\frac{5}{2}\cdot\frac{2}{5})^{10} = 1^{10} = 1\\\\\\c) \ (-0,6)^{4}:6^{4} = (-0,6:6)^{4} = (-0,1)^{4} = 0,0001\\\\\\d) \ (-\frac{4}{19})^{3}:(\frac{1}{19})^{3} = (-\frac{4}{19}\cdot\frac{19}{1})^{3} = (-4)^{3} = -64[/tex]
