Express as a Single Logarithm with a Coefficient of 1 $3 \log \frac{a}{p}+\log \frac{b}{q}-\log \frac{c}{r}$

Express as a single logarithm with a coefficient of 1 :
$3 \log \frac{a}{p}+\log \frac{b}{q}-\log \frac{c}{r}$