There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ -30.31{x}^{3} + 81.46{x}^{2} - 68.91x + 18.79\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = -30.31x^{3} + 81.46x^{2} - 68.91x + 18.79\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( -30.31x^{3} + 81.46x^{2} - 68.91x + 18.79\right)}{dx}\\=&-30.31*3x^{2} + 81.46*2x - 68.91 + 0\\=&-90.93x^{2} + 162.92x - 68.91\\ \end{split}\end{equation} \]

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