Помогите сократить дроби:
$frac{x^6y^2}{x^4y}$
$frac{16ab^4}{-56ab^3}$
$frac{65a^3c^5}{13a^3c^3}$
$frac{5y(b-7)}{10(b-7)^2}$
$frac{2x-2b}{3(x-b)}$
$frac{7x-21y}{35xk}$
$frac{3(a-b)}{a(b-a)}$
$frac{p^2-5pq}{10q-2p}$

1) $frac{ x^{6} y^{2} }{ x^{4} y} = x^{2} y$
2) $frac{16ab ^{4} }{-56ab ^{3} }=- frac{2b}{7}$
3) $frac{65 a^{3}c ^{5} }{13 a^{3} c^{3} }= 5 c^{2}$
4) $frac{5y(b-7)}{10(b-7) ^{2} } = frac{y}{2(b-7)}= frac{y}{2b-14}$
5) $frac{2x-2b}{3(x-b)}= frac{2(x-b)}{3(x-b)}= frac{2}{3}$
6) $frac{7x-21y}{35xk}= frac{7(x-3y)}{35xk}= frac{x-3y}{5xk}$
7) $frac{3(a-b)}{a(b-a)} = frac{3(a-b)}{-a(a-b)} =- frac{3}{a}$
8) $frac{ p^{2}-5pq }{10q-2p}= frac{p(p-5q)}{-2(p-5q)} =- frac{p}{2}$