How can I align the numbers in this equation and how to add a number?

Question

I would like to align the number 1 and 2 in this equation

My code is $$ \epsilon^{y'}_{1}\omega_{2} $$

How do I do this? Thanks !

Answer 1

You should not use the TeX way $$ ... $$ to display math . Instead, use \[ ... ]\. See why here.

To align the subscripts adding ^{}works :

\[ \epsilon^{y'}_{1} \omega^{}_{2} \]