There are 1 questions in this calculation: for each question, the 2 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ second\ derivative\ of\ function\ -2.1864{x}^{4} + 86.677{x}^{3} - 1429.3{x}^{2} + 11493x + 9958.1\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = -2.1864x^{4} + 86.677x^{3} - 1429.3x^{2} + 11493x + 9958.1\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( -2.1864x^{4} + 86.677x^{3} - 1429.3x^{2} + 11493x + 9958.1\right)}{dx}\\=&-2.1864*4x^{3} + 86.677*3x^{2} - 1429.3*2x + 11493 + 0\\=&-8.7456x^{3} + 260.031x^{2} - 2858.6x + 11493\\\\ &\color{blue}{The\ second\ derivative\ of\ function:} \\&\frac{d\left( -8.7456x^{3} + 260.031x^{2} - 2858.6x + 11493\right)}{dx}\\=&-8.7456*3x^{2} + 260.031*2x - 2858.6 + 0\\=&-26.2368x^{2} + 520.062x - 2858.6\\ \end{split}\end{equation} \]

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