There are 1 questions in this calculation: for each question, the 1 derivative of a is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ 81{a}^{5} - 90{a}^{3} + 75a - 22\ with\ respect\ to\ a：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = 81a^{5} - 90a^{3} + 75a - 22\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( 81a^{5} - 90a^{3} + 75a - 22\right)}{da}\\=&81*5a^{4} - 90*3a^{2} + 75 + 0\\=&405a^{4} - 270a^{2} + 75\\ \end{split}\end{equation} \]

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