Решение:
$$\frac{(a+2)^6}{(b+3)^3c^3} \cdot \frac{(b+3)^2c^3}{(a+2)^9} = \frac{(a+2)^6(b+3)^2c^3}{(b+3)^3c^3(a+2)^9} = \frac{(a+2)^6(b+3)^2c^3}{(a+2)^9(b+3)^3c^3} = \frac{1}{(a+2)^{9-6}(b+3)^{3-2}} = \frac{1}{(a+2)^3(b+3)^1} = \frac{1}{(a+2)^3(b+3)}$$
Ответ: $$\frac{1}{(a+2)^3(b+3)}$$