Сократите дробь:
\(1)\ \frac{14a^3}{21a};\)
\(2)\ \frac{8b^3c^2}{12bc^3};\)
\(\vphantom{\frac{0^0}{0}}3)\ \frac{5x}{20x};\)
\(4)\ \frac{24x^2y^2}{32xy};\)
\(\vphantom{\frac{0^0}{0}}5)\ \frac{4abc}{16ab^4};\)
\(6)\ \frac{56m^5n^7}{42m^5n^{10}};\)
\(7)\ \frac{{-}10n^{10}}{5n^4};\)
\(8)\ \frac{3p^4q^6}{{-}9p^8q^7}.\)