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The point of yoga is that you have to move your energies around. When entities or dreams tell you to do yoga sometimes they want you to get those energies. I am currently being able to instinctively make yoga poses by wanting a change in my body. It's intuitive completely and it looks like a half assed yoga or random movements but my bones crack and go into the place they should be. I don't "know" yoga with my human mind but I know yoga with my energies because I am working with Shiva and with many other deities. It's a hard to explain but it's more like a flow of consciousness than a self realized knowledge. The point is doing yoga "precisely" at the start is not important if you have assistance. They correct your movements. And as you do it you will figure it out. Follow your insights.
And why you need math or why you need to solve math problems. Math is a gateway to many concepts and a foundation you can build really complicated things on. I got insights on numerology and on the symbol of π and with that I could connect to higher energies better.
Now the problem:
> math is a weakness of mine, I really disliked it and did badly in school
If you think like this when an entity tries to give you a concept and it has a "math" part your subconscious will reject it. In your dream an entity tried to teach you something. Something you are familiar with. The internet.
Now the point is not that you need to be PhD level in math all you need is that when you see a math problem you don't instantly reject it. And if that can "flow" into your mind further it might evolve into more complex symbols/dreams/knowledge.