I need to simplify 2 expressions:
a)
b)
Are you meant to use index laws? If so then note:
a) (the last is a debatable simplification).
b) . Now use the fact that .
(Judging from your other posts the algebra here should be routine to someone with your background).
Note: Simplify is a very vague word to use without a broader context in which to place these question.