Language is remarkable, except under the extreme constraints of mathematics and logic, it never can talk only about what it's supposed to talk about but is always spreading around.

In mathematics the art of proposing a question must be held of higher value than solving it. ...Georg Cantor ( inventor of set theory)

M4Math helped me a lot.

Thanks m4 maths for helping to get placed in several companies.
I must recommend this website for placement preparations.