3. Выполните деление: 1) $$\frac{21b^8}{10c^6} : \frac{7b^2}{30c^3}$$; 2) $$\frac{40a^5b^9}{39c^6d^{14}} : (-\frac{5a^8b^3}{26c^{12}d^7})$$; 3) $$36x^{16}y^{14} : \frac{18x^{18}y^{10}}{11m^3}$$; 4) $$\frac{60m^6n^5}{17p^4} : (15m^8n^{10})$$; 5) $$\frac{x - 3}{6x^3} : \frac{x^2 - 6x + 9}{18x^4}$$; 6) $$\frac{x^2 + 4x}{5x-5} : \frac{7x + 28}{x - 1}$$

3. Выполните деление: 1) $$\frac{21b^8}{10c^6} : \frac{7b^2}{30c^3} = \frac{21b^8}{10c^6} \cdot \frac{30c^3}{7b^2} = \frac{21b^8 \cdot 30c^3}{10c^6 \cdot 7b^2} = \frac{3b^6 \cdot 3}{c^3} = \frac{9b^6}{c^3}$$ <p><strong>Ответ: </strong>$$\frac{9b^6}{c^3}$$</p> 2) $$\frac{40a^5b^9}{39c^6d^{14}} : (-\frac{5a^8b^3}{26c^{12}d^7}) = -\frac{40a^5b^9}{39c^6d^{14}} \cdot \frac{26c^{12}d^7}{5a^8b^3} = -\frac{40a^5b^9 \cdot 26c^{12}d^7}{39c^6d^{14} \cdot 5a^8b^3} = -\frac{8b^6 \cdot 2c^6}{3d^7a^3} = -\frac{16b^6c^6}{3a^3d^7}$$ <p><strong>Ответ: </strong>$$- \frac{16b^6c^6}{3a^3d^7}$$</p> 3) $$36x^{16}y^{14} : \frac{18x^{18}y^{10}}{11m^3} = 36x^{16}y^{14} \cdot \frac{11m^3}{18x^{18}y^{10}} = \frac{36x^{16}y^{14} \cdot 11m^3}{18x^{18}y^{10}} = \frac{2y^4 \cdot 11m^3}{x^2} = \frac{22y^4m^3}{x^2}$$ <p><strong>Ответ: </strong>$$\frac{22y^4m^3}{x^2}$$</p> 4) $$\frac{60m^6n^5}{17p^4} : (15m^8n^{10}) = \frac{60m^6n^5}{17p^4} \cdot \frac{1}{15m^8n^{10}} = \frac{60m^6n^5}{17p^4 \cdot 15m^8n^{10}} = \frac{4}{17p^4m^2n^5}$$ <p><strong>Ответ: </strong>$$\frac{4}{17m^2n^5p^4}$$</p> 5) $$\frac{x - 3}{6x^3} : \frac{x^2 - 6x + 9}{18x^4} = \frac{x - 3}{6x^3} \cdot \frac{18x^4}{x^2 - 6x + 9} = \frac{(x - 3) \cdot 18x^4}{6x^3 \cdot (x - 3)^2} = \frac{3x}{x - 3}$$ <p><strong>Ответ: </strong>$$\frac{3x}{x - 3}$$</p> 6) $$\frac{x^2 + 4x}{5x-5} : \frac{7x + 28}{x - 1} = \frac{x^2 + 4x}{5x-5} \cdot \frac{x - 1}{7x + 28} = \frac{x(x + 4) \cdot (x - 1)}{5(x - 1) \cdot 7(x + 4)} = \frac{x}{35}$$ <p><strong>Ответ: </strong>$$\frac{x}{35}$$</p>