First question- Use the properties of logarithms to condense.

4lnx - 5lny

Second question- Use the properties of logarithms to expand.

log

_{2}3a

^{4}

So I know that the first question involves natural logs... but that's about it. I don't know how to condense/ expand logarithms- well I probably know how to, I just don't know it under that terminology.

And I can't remember what the properties of logs are.

Please help!