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

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