\[\boxed{\text{208\ (208).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.
Решение.
\[1)\ a^{12}\ :a^{3} = a^{12 - 3} = a^{9}\]
\[2)\ b^{6}\ :b = b^{6 - 1} = b^{5}\]
\[3)\ c^{7}\ :с^{6} = c^{7 - 6} = c^{1} = c\]
\[4)\ (a + b)^{8}\ :(a + b)^{4} =\]
\[= (a + b)^{8 - 4} = (a + b)^{4}\]