There are 1 questions in this calculation: for each question, the 1 derivative of y is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ xy - sin(2π{y}^{2})\ with\ respect\ to\ y：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = xy - sin(2πy^{2})\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( xy - sin(2πy^{2})\right)}{dy}\\=&x - cos(2πy^{2})*2π*2y\\=&x - 4πycos(2πy^{2})\\ \end{split}\end{equation} \]

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