Question

30^n+3 ÷ 10^n+3 - 3^n× 3^3 =

Answer 1

$30^{n+3} : 10^{n+3} - 3^{n}* 3^{3} =\\ 10^{n+3}* 20^{n+3}: 10^{n+3}- 3^{n+3} =\\ 20^{n+3} - 3^{n+3} =$
$3^{n+3}*17^{n+3}-3^{n+3}=3^{n+3}(17^{n+3}-1)$