If \(\rm f(x)=\begin{vmatrix}x^3&2x^2+1&1+3x\\\ 3x^2+2&2x&x^3+6\\\ x^3-x&4&x^2-2\end{vmatrix}\) for all x ∈ ℝ then 2f(0) + f'(0) is equal to