Answer
$ \ln \left ( \frac {x^3y^5}{ z^6} \right )$.
Work Step by Step
The given expression is
$= 3\ln x+5\ln y-6 \ln z$
Use power rule.
$= \ln x^3+\ln y^5- \ln z^6$
Use product rule.
$= \ln (x^3y^5)- \ln z^6$
Use quotient rule.
$= \ln \left ( \frac {x^3y^5}{ z^6} \right )$.
