"Hn? Oh!" Terra surrendered her papers quickly and leaned back in her chair to watch Mitsuru look over her notes.

And the notes, such as they were, were kind of all over the place, disconnected. Sample equations are written down here and there, and she has tiny scribbles trying to work out what they mean - while it's all copied word for word it's pretty clear she doesn't really 'get it' when the equation goes past, 3+(x-4)=37.