There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ {x}^{3}cos(5{\frac{1}{x}}^{4})\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = x^{3}cos(\frac{5}{x^{4}})\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( x^{3}cos(\frac{5}{x^{4}})\right)}{dx}\\=&3x^{2}cos(\frac{5}{x^{4}}) + \frac{x^{3}*-sin(\frac{5}{x^{4}})*5*-4}{x^{5}}\\=&3x^{2}cos(\frac{5}{x^{4}}) + \frac{20sin(\frac{5}{x^{4}})}{x^{2}}\\ \end{split}\end{equation} \]

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