Expand the Logarithm in Terms of Sums and Differences $$\ln \frac { x ^ { 3 } \cos ^ { 2 } x } { \sqrt { x ^ { 2 } + 1 } }$$

Essay

Expand the logarithm in terms of sums and differences: $$\ln \frac { x ^ { 3 } \cos ^ { 2 } x } { \sqrt { x ^ { 2 } + 1 } }$$