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

Your problem has not been solved here? Please take a look at the  hot problems ！