There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ 2xarctan(x) - ln(1 + xx)\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = 2xarctan(x) - ln(x^{2} + 1)\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( 2xarctan(x) - ln(x^{2} + 1)\right)}{dx}\\=&2arctan(x) + 2x(\frac{(1)}{(1 + (x)^{2})}) - \frac{(2x + 0)}{(x^{2} + 1)}\\=&2arctan(x)\\ \end{split}\end{equation} \]

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