Answer: TERMS OF YANNIS RIGA
Find it fine you say, just when I once dealt with systems via computer I remember I put symmetrically, alternations and something like that what I see now seems to me as a 4th degree equation. However because several times I had lost more than one term, I ended up conclusion that the standard variables are better. Of course with the lion's portion going to 14 arias I do not know how prudent it is to go for 13 ceilings ..