\[\boxed{\text{4.\ 287}}\]
\[\textbf{а)}\ p^{2}:\]
\[( - 4)^{2} = 16;\]
\[\left( - \frac{1}{9} \right)^{2} = \frac{1}{81};\]
\[(0,6)^{2} = 0,36;\]
\[( - 0,8)^{2} = 0,64;\]
\[\left( - 2\frac{1}{3} \right)^{2} = \left( - \frac{7}{3} \right)^{2} = \frac{49}{9} = 5\frac{4}{9};\]
\[\left( 3\frac{1}{5} \right)^{2} = \left( \frac{16}{5} \right)^{2} = \frac{256}{25} = 10\frac{6}{25}.\]
\[\textbf{б)}\ b^{3}:\]
\[( - 2)^{3} = - 8;\]
\[\left( - \frac{2}{3} \right)^{3} = - \frac{8}{27};\]
\[(0,1)^{3} = 0,001;\]
\[( - 0,1)^{3} = - 0,001;\]
\[\left( - 1\frac{1}{5} \right)^{3} = \left( - \frac{6}{5} \right)^{3} = - \frac{216}{125} =\]
\[= - 1\frac{91}{125};\]
\[\left( 2\frac{1}{2} \right)^{3} = \left( \frac{5}{2} \right)^{3} = \frac{125}{8} = 15\frac{5}{8}.\]