There are 1 questions in this calculation: for each question, the 15 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ 15th\ derivative\ of\ function\ x - arctan(x)\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ \\ &\color{blue}{The\ 15th\ derivative\ of\ function:} \\=& - \frac{1428329123020800x^{14}}{(x^{2} + 1)^{15}} + \frac{4642069649817600x^{12}}{(x^{2} + 1)^{14}} - \frac{5891857632460800x^{10}}{(x^{2} + 1)^{13}} + \frac{3682411020288000x^{8}}{(x^{2} + 1)^{12}} - \frac{1171676233728000x^{6}}{(x^{2} + 1)^{11}} + \frac{175751435059200x^{4}}{(x^{2} + 1)^{10}} - \frac{9763968614400x^{2}}{(x^{2} + 1)^{9}} + \frac{87178291200}{(x^{2} + 1)^{8}}\\ \end{split}\end{equation} \]

Your problem has not been solved here? Please take a look at the  hot problems ！