Математичний аналіз і диференціальні рівняння вивчаю САМ

I'm sorry for off-topic, I am considering about building an instructive web site for college students. Will possibly commence with publishing interesting facts such as"750ml of blood pumps through your brain every minute which is 15-20% of blood flow from the heart."Please let me know if you know where I can find some related information like here

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