There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ -0.0000007*30{x}^{4} + 0.00007*20{x}^{3} - 0.0025*12{x}^{2} + 0.04198*6x - 0.8557*2\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = -0.000021x^{4} + 0.0014x^{3} - 0.03x^{2} + 0.25188x - 1.7114\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( -0.000021x^{4} + 0.0014x^{3} - 0.03x^{2} + 0.25188x - 1.7114\right)}{dx}\\=&-0.000021*4x^{3} + 0.0014*3x^{2} - 0.03*2x + 0.25188 + 0\\=&-0.000084x^{3} + 0.0042x^{2} - 0.06x + 0.25188\\ \end{split}\end{equation} \]

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