3) Сократите дробь: а) \(\frac{x^6y^2}{x^4y}\); б) \(\frac{16ab^4}{-56ab^3}\); в) \(\frac{42p^4q^3}{63p^3q^4}\); г) \(\frac{65a^5c^5}{13a^3c^3}\).

1. \(\frac{x^6y^2}{x^4y}=x^2y\).
2. \(\frac{16ab^4}{-56ab^3}=-\frac{2b}{7}\).
3. \(\frac{42p^4q^3}{63p^3q^4}=\frac{2p}{3q}\).
4. \(\frac{65a^5c^5}{13a^3c^3}=5a^2c^2\).

Ответ: а) \(x^2y\); б) \(-\frac{2b}{7}\); в) \(\frac{2p}{3q}\); г) \(5a^2c^2\).