Re: Train running cost

Grador wrote:
> In standard math (AR * TS)^2 = AR * (TS^2) = AR * TS * TS. :)
> It is all just multiplying, so it doesn't matter where are the
> brackets, or if they are there at all.
> You all should repeat basic school :)
>   
Ahh,  but the parenthesis is intended to /confirm/ to the reader (albeit 
human or computer) the exact order of computation.  Extra parenthesis do 
not in any way, shape or form affect the computation if the order of 
execution is unchanged (i.e. X^2 + Y * Z^2 is no different to ((X^2) + 
(Y * (Z^2)) - both return the same result) they just render the 
calculation clearer to us mere human readers.