Answer
$\log _{5}\dfrac {\left( 3x+1\right) ^{3}}{x\left( 2x-1\right) ^{2}}$
Work Step by Step
We use the rules of logarithms to obtain:
$3\log _{5}\left( 3x+1\right) -2\log _{5}\left( 2x-1\right) -\log _{5}x=\log _{5}\dfrac {\left( 3x+1\right) ^{3}}{x\left( 2x-1\right) ^{2}}$