QuestionFind $d u$ and $u$ \begin{tabular}{|l|} \hline 6. $\int \operatorname{Arctan} x d x$ \\ \hline 7. $\int \frac{\operatorname{Arcsin} 2 x d x}{\sqrt{1-4 x^{2}}}$ \\ \hline 8. $\int x \csc \left(1-x^{2}\right) \cot \left(1-x^{2}\right) d x$ \\ \hline 9. $\int 10^{\cos x} e^{\cos x} \sin x d x$ \\ \hline $10 \int x^{3} e^{2 x} d x$ \\ \hline \end{tabular}