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

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