There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ (6 + x)(6 - x)(1 + x)(1 + x)\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = 72x + 35x^{2} - x^{4} - 2x^{3} + 36\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( 72x + 35x^{2} - x^{4} - 2x^{3} + 36\right)}{dx}\\=&72 + 35*2x - 4x^{3} - 2*3x^{2} + 0\\=&70x - 4x^{3} - 6x^{2} + 72\\ \end{split}\end{equation} \]

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