This is LaTeX code:
[latex]
\displaystyle \prod_{i\in n}(\omega\cdot 2+i)=\omega^n\cdot 2+\omega^{n-1}\cdot 2\cdot (n-1)+\omega^{n-2}\cdot 2\cdot (n-2)+\cdots+\omega\cdot 2
[/latex]