There are 1 questions in this calculation: for each question, the 2 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ second\ derivative\ of\ function\ -(Ccos(2)x + Dsin(2)x)\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = -Cxcos(2) - Dxsin(2)\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( -Cxcos(2) - Dxsin(2)\right)}{dx}\\=&-Ccos(2) - Cx*-sin(2)*0 - Dsin(2) - Dxcos(2)*0\\=&-Ccos(2) - Dsin(2)\\\\ &\color{blue}{The\ second\ derivative\ of\ function:} \\&\frac{d\left( -Ccos(2) - Dsin(2)\right)}{dx}\\=&-C*-sin(2)*0 - Dcos(2)*0\\=& - 0\\ \end{split}\end{equation} \]

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