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

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