There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ x*11.9*800*800*3.14(1 - (\frac{sin(6.28)xx}{6.28}) + (3x - 1.25)*360*6518)\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = - 3808000x^{3}sin(6.28) + 23914240x + 1683428576256x^{2} - 70142857344000x\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( - 3808000x^{3}sin(6.28) + 23914240x + 1683428576256x^{2} - 70142857344000x\right)}{dx}\\=& - 3808000*3x^{2}sin(6.28) - 3808000x^{3}cos(6.28)*0 + 23914240 + 1683428576256*2x - 70142857344000\\=& - 11424000x^{2}sin(6.28) + 3366857152512x - 70142833429760\\ \end{split}\end{equation} \]

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