There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ 2 * {4}^{x} - cos(3)x\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = 2 * {4}^{x} - xcos(3)\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( 2 * {4}^{x} - xcos(3)\right)}{dx}\\=&2({4}^{x}((1)ln(4) + \frac{(x)(0)}{(4)})) - cos(3) - x*-sin(3)*0\\=&2 * {4}^{x}ln(4) - cos(3)\\ \end{split}\end{equation} \]

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