Using math in study mode
Tl;dr: Type math intuitively like you would on a platform such as Desmos.
How to type math for a short response question
If the creator of the set you are studying used HashCards' math feature, it will be easier to use the study mode on that set. Look below for how to type certain math keywords and functions.
Symbols & characters
Basic
Here's how you can type some basic equations in HashCards:
Advanced
To type any of the more advanced symbols, use the keyword listed: