[30 ^(n-3)] (5 ^(n-3))(6 ^(n-3)) 5²·6³
------------------------------- = ------------------------------------ = ----------- =5·2·6=60
90 ·(5^(n-5) )·(6^(n-6) ) 5·3·6 ·(5^(n-5) )·(6^(n-6)) 5·3·6
45^(133) (5^133)·(3²)^133 5³·3^266
------------------- = -----------------------= --------------- = 5³·3=125·3= 375
(3^265)·5^130 (3^265)·5^130 (3^265)