Question 763367
1/2logbase10 25-2logbase10 3+logbase10 18
-------------
base 10 is the default, you don't need to mention it.
1/2log(25)- 2log(3) + log(18)
= log(5) - log(9) + log(18)
= log(5*18/9) = log(10)
= 1