There are 1 questions in this calculation: for each question, the 2 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ second\ derivative\ of\ function\ 8xxsin(x)\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = 8x^{2}sin(x)\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( 8x^{2}sin(x)\right)}{dx}\\=&8*2xsin(x) + 8x^{2}cos(x)\\=&16xsin(x) + 8x^{2}cos(x)\\\\ &\color{blue}{The\ second\ derivative\ of\ function:} \\&\frac{d\left( 16xsin(x) + 8x^{2}cos(x)\right)}{dx}\\=&16sin(x) + 16xcos(x) + 8*2xcos(x) + 8x^{2}*-sin(x)\\=&16sin(x) + 32xcos(x) - 8x^{2}sin(x)\\ \end{split}\end{equation} \]

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