What does purification have to do with understanding complicated math? That would require enhancement, not... whatever I just read. Your mind is only capable of understanding that which it's taught. You need to form
physical connections. If anything would allow that, it would be something that gives you hyper focus, which would have to be AW.
Azure is advertised as mind, illusion, and air. It makes sense that it would allow you to understand complex/abstract ideas.
Maybe if you combined an AW glyph with a BlW glyph you'd succeed in finding a relevant spell, but BlW on its own?
enhancing the mind by cleaning it from restrictions, or "psychic pollution"?
Restrictions that lower your present capabilities due to polluting thoughts? Once those restrictions are lifted, you're still left with your own intelligence. You're not going to magically become smarter. Think clearer, yes; become a genius, no.