There are 1 questions in this calculation: for each question, the 2 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ second\ derivative\ of\ function\ \frac{(xy + {e}^{(xy)})sec(x)}{sec(x)}\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = yx + {e}^{(yx)}\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( yx + {e}^{(yx)}\right)}{dx}\\=&y + ({e}^{(yx)}((y)ln(e) + \frac{(yx)(0)}{(e)}))\\=&y{e}^{(yx)} + y\\\\ &\color{blue}{The\ second\ derivative\ of\ function:} \\&\frac{d\left( y{e}^{(yx)} + y\right)}{dx}\\=&y({e}^{(yx)}((y)ln(e) + \frac{(yx)(0)}{(e)})) + 0\\=&y^{2}{e}^{(yx)}\\ \end{split}\end{equation} \]

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