There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ ({x}^{3}) - \frac{9}{x} - \frac{7}{(sin(x))}\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = x^{3} - \frac{9}{x} - \frac{7}{sin(x)}\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( x^{3} - \frac{9}{x} - \frac{7}{sin(x)}\right)}{dx}\\=&3x^{2} - \frac{9*-1}{x^{2}} - \frac{7*-cos(x)}{sin^{2}(x)}\\=&3x^{2} + \frac{9}{x^{2}} + \frac{7cos(x)}{sin^{2}(x)}\\ \end{split}\end{equation} \]

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