There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ 20x{(1 - x)}^{3}\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = -20x^{4} + 60x^{3} - 60x^{2} + 20x\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( -20x^{4} + 60x^{3} - 60x^{2} + 20x\right)}{dx}\\=&-20*4x^{3} + 60*3x^{2} - 60*2x + 20\\=&-80x^{3} + 180x^{2} - 120x + 20\\ \end{split}\end{equation} \]

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