There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ {x}^{7} + 3{x}^{64}{x}^{2} + 5\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = 3x^{66} + x^{7} + 5\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( 3x^{66} + x^{7} + 5\right)}{dx}\\=&3*66x^{65} + 7x^{6} + 0\\=&198x^{65} + 7x^{6}\\ \end{split}\end{equation} \]

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