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

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