There are 1 questions in this calculation: for each question, the 2 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ second\ derivative\ of\ function\ 2e^{-2x} - e^{-5x} + 3\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( 2e^{-2x} - e^{-5x} + 3\right)}{dx}\\=&2e^{-2x}*-2 - e^{-5x}*-5 + 0\\=&-4e^{-2x} + 5e^{-5x}\\\\ &\color{blue}{The\ second\ derivative\ of\ function:} \\&\frac{d\left( -4e^{-2x} + 5e^{-5x}\right)}{dx}\\=&-4e^{-2x}*-2 + 5e^{-5x}*-5\\=&8e^{-2x} - 25e^{-5x}\\ \end{split}\end{equation} \]

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