There are 1 questions in this calculation: for each question, the 2 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ second\ derivative\ of\ function\ 5{x}^{3} + 7sin(x)\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = 5x^{3} + 7sin(x)\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( 5x^{3} + 7sin(x)\right)}{dx}\\=&5*3x^{2} + 7cos(x)\\=&15x^{2} + 7cos(x)\\\\ &\color{blue}{The\ second\ derivative\ of\ function:} \\&\frac{d\left( 15x^{2} + 7cos(x)\right)}{dx}\\=&15*2x + 7*-sin(x)\\=&30x - 7sin(x)\\ \end{split}\end{equation} \]

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