3) Сократите дробь: а) a²b⁵/(ab⁷); б) −63xy⁵/(81xy⁴); в) 30a²c³/(48a³c²); г) 111p⁶q⁶/(37p⁴q⁴).

1. \(\dfrac{a^2b^5}{ab^7}=\dfrac{a}{b^2}\).
2. \(\dfrac{-63xy^5}{81xy^4}=-\dfrac{7y}{9}\).
3. \(\dfrac{30a^2c^3}{48a^3c^2}=\dfrac{5c}{8a}\).
4. \(\dfrac{111p^6q^6}{37p^4q^4}=3p^2q^2\).

Ответ: а) \(\dfrac{a}{b^2}\); б) \(-\dfrac{7y}{9}\); в) \(\dfrac{5c}{8a}\); г) \(3p^2q^2\).