3) a) $$rac{a^2b^5}{ab^7}$$ б) $$rac{-63xy^5}{81xy^4}$$ B) $$rac{30a^2c^3}{48a^3c^2}$$ г) $$rac{111p^6q^6}{37p^4q^4}$$

3) а) $$rac{a^2b^5}{ab^7} = \frac{a}{b^2}$$ б) $$rac{-63xy^5}{81xy^4} = -\frac{7y}{9}$$ в) $$rac{30a^2c^3}{48a^3c^2} = \frac{5c}{8a}$$ г) $$rac{111p^6q^6}{37p^4q^4} = 3p^2q^2$$