There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ (2x + 10)(4x + 10) - (3x + 9)(3x - 9)\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = -x^{2} + 60x + 181\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( -x^{2} + 60x + 181\right)}{dx}\\=&-2x + 60 + 0\\=&-2x + 60\\ \end{split}\end{equation} \]

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