- $ln\left( {a{b^2}} \right) = \ln a + {\left( {\ln b} \right)^2}$
- $\ln \left( {ab} \right) = \ln a.\ln b$
- $\ln \left( {a{b^2}} \right) = \ln a + 2\ln b$
- $\ln \dfrac{a}{b} = \dfrac{{\ln a}}{{\ln b}}$