Question

помогите!!!!!!!даю 50

Answer 1

$\tt 6) \ \ b^{105}={(b^{15})}^7\\\\\\ 7) \ \ (n-7)^8:(n-7)^3=(n-7)^{8-3}=(n-7)^5\\\\\\ 8) \ \ n^{10}\cdot n^2=n^{10+2}=n^{12}$