There are 1 questions in this calculation: for each question, the 2 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ second\ derivative\ of\ function\ -0.00004{x}^{3} + 0.0044{x}^{2} - 0.0064x + 8.1329\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = -0.00004x^{3} + 0.0044x^{2} - 0.0064x + 8.1329\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( -0.00004x^{3} + 0.0044x^{2} - 0.0064x + 8.1329\right)}{dx}\\=&-0.00004*3x^{2} + 0.0044*2x - 0.0064 + 0\\=&-0.00012x^{2} + 0.0088x - 0.0064\\\\ &\color{blue}{The\ second\ derivative\ of\ function:} \\&\frac{d\left( -0.00012x^{2} + 0.0088x - 0.0064\right)}{dx}\\=&-0.00012*2x + 0.0088 + 0\\=&-0.00024x + 0.0088\\ \end{split}\end{equation} \]

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