If I have a polynomial $f(x) = ax^n + bx^{n-1} + cx^{n-2} \ldots zx^0$, is there any mathematical notation for one term, such as the $x^3$ term. For example, if I have a polynomial of $f(x) = x^6 + \ldots 2x^3 + 5x^2 \ldots + 9$, and I multiply it by $2 + x$ to get $g(x)$, how do i write:
$$ x^3 \text{ terms of } g(x) = 2\cdot(2x^3) + x\cdot(5x^2)$$
Thank you very much!
(Tried looking on wikipedia)