There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ \frac{(m{u}^{2}r)}{(as({(R + \frac{r}{s})}^{2} + {(X + x)}^{2}))}\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = \frac{mu^{2}r}{(asR^{2} + 2raR + \frac{r^{2}a}{s} + 2asXx + asX^{2} + asx^{2})}\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( \frac{mu^{2}r}{(asR^{2} + 2raR + \frac{r^{2}a}{s} + 2asXx + asX^{2} + asx^{2})}\right)}{dx}\\=&(\frac{-(0 + 0 + 0 + 2asX + 0 + as*2x)}{(asR^{2} + 2raR + \frac{r^{2}a}{s} + 2asXx + asX^{2} + asx^{2})^{2}})mu^{2}r + 0\\=& - \frac{2mu^{2}rasX}{(asR^{2} + 2raR + \frac{r^{2}a}{s} + 2asXx + asX^{2} + asx^{2})^{2}} - \frac{2mu^{2}rasx}{(asR^{2} + 2raR + \frac{r^{2}a}{s} + 2asXx + asX^{2} + asx^{2})^{2}}\\ \end{split}\end{equation} \]

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