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

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