There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ \frac{-xF(3{l}^{2} - 4{x}^{2})}{(48ab)}\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = \frac{\frac{-1}{16}Fl^{2}x}{ab} + \frac{\frac{1}{12}Fx^{3}}{ab}\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( \frac{\frac{-1}{16}Fl^{2}x}{ab} + \frac{\frac{1}{12}Fx^{3}}{ab}\right)}{dx}\\=&\frac{\frac{-1}{16}Fl^{2}}{ab} + \frac{\frac{1}{12}F*3x^{2}}{ab}\\=&\frac{-Fl^{2}}{16ab} + \frac{Fx^{2}}{4ab}\\ \end{split}\end{equation} \]

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