\[\boxed{\text{215\ (215).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1) - x \cdot x^{2} = - x^{3}\]
\[2)\ ( - x)^{2} \cdot x = x^{2} \cdot x = x^{3}\]
\[3) - x \cdot ( - x)^{2} = - x \cdot x^{2} = - x^{3}\]
\[4)\ ( - x) \cdot ( - x)^{2} \cdot ( - x) =\]
\[= x^{2} \cdot x^{2} = x^{4}\]