Which is the proper way of condensing this:

ln2-4ln3

Is it:

ln2+ln3^(-4)

or

ln2-ln3^4

Are either of these ways valid? And if so, which is the appropriate way? Or does that matter on the problem?

My other question.. Are these valid:

3^(x+1) = (3^x)*3

3^(x-1) = (3^x)/x or (3^x)(3^-1)