\[\boxed{\text{216\ (216).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1)\ ( - a)^{2} \cdot a^{3} = a^{2} \cdot a^{3} = a^{5}\]
\[2) - a^{2} \cdot a^{3} = - a^{5}\]
\[3)\ a^{2} \cdot ( - a)^{3} = - a^{5}\]
\[4) - a^{2} \cdot ( - a)^{3} = a^{5}\]