There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ (12 - x)(x)(25 + x)\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = 300x - x^{3} - 13x^{2}\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( 300x - x^{3} - 13x^{2}\right)}{dx}\\=&300 - 3x^{2} - 13*2x\\=& - 3x^{2} - 26x + 300\\ \end{split}\end{equation} \]

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