\[- ( - 0,1)^{4} = - \left( \frac{1}{10} \right)^{4} = - \frac{1}{10^{4}} =\]
\[= - \frac{1}{10^{2} \cdot 10^{2}} = - \frac{1}{10000} =\]
\[= - 0,0001.\]