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Give some important of studying mathematics in everyday life?
It is what you may obtain after studying mathematics at a university.
It is important that someone invented a system of studying mathematics. Whether it was the Babylonians is not important - except perhaps to them.
Euclid (of Alexandria).
Yes it is, if you really don't want to be in the course, or if you allow distractions while you're studying. The course material itself is not that difficult.