CAS Simplify(log10) always changes to LN

[Carsen]

I tackled this with using the Simplify command. Then I used LNCOLLECT to simplify it even further. The final result is LN(12)/LN(10). And since LOG(A)/LOG(B) or LN(A)/LN(B) = LOG of A with a base of B, you can easily read that the answer is the LOG of 12 with a base of 10. See the screenshot below.

As for why it goes to LN, I do not know why. And I am not knowledgeable enough to help you on how to get the answer in LOG form. Good luck and Happy Priming!