"Claudio Irrgang" <layout@com.cvicad> wrote in message
news:kmxub.36041$j1d.26302@news04.bloor.is.net.cable.rogers.com...
> Hello,
>
> I had a question:
>
> Suppose:
>
> K2 = a + b + c
> K1 = a b + b c + c a
> K0 = a b c
>
> I want to acheive "2a - b - c", "2b - a - c", "2c - a - b" using any
> combinations of K2, K1, K0 using any operations (+, -, *,