Use the Formula $\int ( \ln x ) ^ { n } d x = x ( \ln x ) ^ { n } - n \int ( \ln x ) ^ { n - 1 } d x$

Short Answer

Use the formula $\int ( \ln x ) ^ { n } d x = x ( \ln x ) ^ { n } - n \int ( \ln x ) ^ { n - 1 } d x$ to evaluate $\int ( \ln x ) ^ { 3 } d x$ .