12. glog13507/3log133

12. $$\frac{3^{\log_{13} 507}}{3^{\log_{13} 3}} = 3^{\log_{13} 507 - \log_{13} 3} = 3^{\log_{13} \frac{507}{3}} = 3^{\log_{13} 169} = 3^{\log_{13} 13^2} = 3^{2} = 9$$

Ответ: 9