Question 1040378
.
<pre>
  log(x) + log(1) – 4*log(y) = 

= log(x) +   0    - 4*log(y) =
= {{{log((x/y^4))}}}.
</pre>On properties of logarithms see the lessons

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/logarithm/what-is-the-logarithm.lesson>WHAT IS the logarithm</A>, 

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/logarithm/Properties-of-the-logarithm.lesson>Properties of the logarithm</A>, 

in this site.