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

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