There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ -0.0021{x}^{3} + 0.0556{x}^{2} + 0.0263x - 0.3759\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = -0.0021x^{3} + 0.0556x^{2} + 0.0263x - 0.3759\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( -0.0021x^{3} + 0.0556x^{2} + 0.0263x - 0.3759\right)}{dx}\\=&-0.0021*3x^{2} + 0.0556*2x + 0.0263 + 0\\=&-0.0063x^{2} + 0.1112x + 0.0263\\ \end{split}\end{equation} \]

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