\[\boxed{\text{438\ (438).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.
Решение.
\[\textbf{а)}\ \left( x^{3} \right)^{2} = x^{2 \cdot 3} = x^{6}\]
\[\textbf{б)}\ \left( x^{2} \right)^{3} = x^{2 \cdot 3} = x^{6}\]
\[\textbf{в)}\ \left( a^{5} \right)^{4} = a^{5 \cdot 4} = a^{20}\]
\[\textbf{г)}\ \left( a^{6} \right)^{3} = a^{6 \cdot 3} = a^{18}\]
\[\textbf{д)}\ \left( y^{2} \right)^{5} = y^{2 \cdot 5} = y^{10}\]
\[\textbf{е)}\ \left( y^{7} \right)^{2} = y^{7 \cdot 2} = y^{14}\]
\[\textbf{ж)}\ \left( b^{3} \right)^{3} = b^{3 \cdot 3} = b^{9}\]
\[\textbf{з)}\ \left( b^{5} \right)^{2} = b^{5 \cdot 2} = b^{10}\]