Question

ln(3)-2ln(4+8)

Answer 1

ln(3) - 2ln(12)
ln(3) - ln(12^2)
ln(3) - ln(144)
ln(3/144)
ln(1/48)
ln(1) - ln(48)
0-ln(48)
-ln(48)

Answer 2

the "tricks" I used here are
a*ln(b) = ln(b^a)
and
ln(a) - ln(b) = ln(a/b)

Answer 3

those tricks are called properties of logs

Answer 4

yes:)