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

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