There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ \frac{-xq({l}^{3} - 2l{x}^{2} + {x}^{3})}{(24ab)}\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = \frac{\frac{-1}{24}ql^{3}x}{ab} + \frac{\frac{1}{12}qlx^{3}}{ab} - \frac{\frac{1}{24}qx^{4}}{ab}\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( \frac{\frac{-1}{24}ql^{3}x}{ab} + \frac{\frac{1}{12}qlx^{3}}{ab} - \frac{\frac{1}{24}qx^{4}}{ab}\right)}{dx}\\=&\frac{\frac{-1}{24}ql^{3}}{ab} + \frac{\frac{1}{12}ql*3x^{2}}{ab} - \frac{\frac{1}{24}q*4x^{3}}{ab}\\=&\frac{qlx^{2}}{4ab} - \frac{ql^{3}}{24ab} - \frac{qx^{3}}{6ab}\\ \end{split}\end{equation} \]

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