There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ 2*20{(65 - x)}^{2}{\frac{1}{65}}^{2}\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = \frac{8}{845}x^{2} - \frac{16}{13}x + 40\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( \frac{8}{845}x^{2} - \frac{16}{13}x + 40\right)}{dx}\\=&\frac{8}{845}*2x - \frac{16}{13} + 0\\=&\frac{16x}{845} - \frac{16}{13}\\ \end{split}\end{equation} \]

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