There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ (2 + 5x)(4 - 3x)\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = - 15x^{2} + 14x + 8\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( - 15x^{2} + 14x + 8\right)}{dx}\\=& - 15*2x + 14 + 0\\=& - 30x + 14\\ \end{split}\end{equation} \]

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