Question

Сократить дробь:
$frac{ a^{7}(a-b)^{2} }{ a^{4}(a-b)^{2} }$

Answer 1

$frac{a7(a-b)^{2}}{a4(a-b)^{2}} = frac{a^{7} }{a^{4}} = frac{a^{3} }{a}$