Major update, almoost all done:
+ getnNumber now works with "-a"
+! deleting all spaces at the begginging; next step will be do delete all stuff like:
	while(formula[i] == ' ')
		i++;
+ added step alternatng args :Z(from,to,step)
+ improved table alternating args
+ gAlternatingArgAmount now resets on each isFormulaCorrect
! need to handle opening and closing brackets in a better way (look for 'saved' in code)
+ check argument and getAlternateArgValues divided into separate function