The determinant of the matrix \[ \left[ \begin{array}{ccc} 1 & 3 & 0 \\ 2 & 6 & 4 \\ -1 & -1 & 2 \end{array} \right] \] is ...........
What is the solution of \( \int x^2 \ln x \, dx \)? Given \( C \) is an arbitrary constant.