There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ 81.941{x}^{4} - 79.978{x}^{3} + 27.469{x}^{2} - 4.4071x + 0.7605\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = 81.941x^{4} - 79.978x^{3} + 27.469x^{2} - 4.4071x + 0.7605\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( 81.941x^{4} - 79.978x^{3} + 27.469x^{2} - 4.4071x + 0.7605\right)}{dx}\\=&81.941*4x^{3} - 79.978*3x^{2} + 27.469*2x - 4.4071 + 0\\=&327.764x^{3} - 239.934x^{2} + 54.938x - 4.4071\\ \end{split}\end{equation} \]

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