Well, there is something I do know something about. Because I've forgotten every single thing I learned in multivariate calculus, except one: few, if any, human beings can imagine what something looks like in seven dimensions. I vividly remember the engineering students struggling, because they were trying to visualize the problems, as I sailed through it with my very abstract thinking. If she thinks of calculus as more akin to poetry than to physics, I think she'll find it much easier.