There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ \frac{399}{((-200x + 199)(-200x + 199))}\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = \frac{399}{(40000x^{2} - 79600x + 39601)}\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( \frac{399}{(40000x^{2} - 79600x + 39601)}\right)}{dx}\\=&399(\frac{-(40000*2x - 79600 + 0)}{(40000x^{2} - 79600x + 39601)^{2}})\\=&\frac{-31920000x}{(40000x^{2} - 79600x + 39601)^{2}} + \frac{31760400}{(40000x^{2} - 79600x + 39601)^{2}}\\ \end{split}\end{equation} \]

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