There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ \frac{(20 - 2{x}^{2} - {x}^{3})}{10}\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = - \frac{1}{5}x^{2} - \frac{1}{10}x^{3} + 2\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( - \frac{1}{5}x^{2} - \frac{1}{10}x^{3} + 2\right)}{dx}\\=& - \frac{1}{5}*2x - \frac{1}{10}*3x^{2} + 0\\=& - \frac{2x}{5} - \frac{3x^{2}}{10}\\ \end{split}\end{equation} \]

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