So You Don't Know Maths?

I wonder if there is truly anyone on earth who is not an expert mathematician. To start with,the human brain performs most of its functions after performing intense calculations e.g adjusting heart rate,concentration of body fluids,interpreting nerve signals etc. Okay,those examples may have been a bit confusing but this isn't: have you ever crossed a busy road? If yes, then your brain had to calculate that the time it would take the nearest oncoming car to reach you was greater than the time you needed to get across. If your brain has ever made a mistake in its calculations... well, you might not be reading this. The calculation mentioned above would take a scientist minutes to solve but your brain does it in split seconds,unconciously as you would know.The brain is like an extraordinary computer with infinite space and data storage capabilities. So next time you get low scores on a maths test,it means...I think you know.