There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ (12 - x)(8 - x)(25 + x)\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = - 404x + x^{3} + 5x^{2} + 2400\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( - 404x + x^{3} + 5x^{2} + 2400\right)}{dx}\\=& - 404 + 3x^{2} + 5*2x + 0\\=&3x^{2} + 10x - 404\\ \end{split}\end{equation} \]

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