YT actually likes doing math. To her, it's like surfing the traffic : it requires her full attention, but that means she gets into this Zen-like state where everything seems to fall into place, and there are patterns she can just manipulate however she likes.

So, weird as it is, she is peering over Kara's shoulder vicariously enjoying the practice problems she's doing. Well, actually, that doesn't last long, because Kara's not so good at them as she is.

"That's not gonna make the exponential curve in the picture." It just sort of slips out.