Help with these logarithms, please

Condense these logarithms

1.) 4 ㏒ x - 2 ㏒ y

2.) ㏒₂ x - ㏒₂ z

.mp4 files, because, video

its a straight line parallel to the time axis

english, cause i can’t you

1) 2/5

2) zero=0/1

3) zero=0/2

4) -4/5

5) undefined=3/0