# poly() is an inert function of polymonial holder,
poly(a,b,c,d,f) is holder of polymonial coefficient for a+b*x+c*x^2+d*x^3+f*x^4,
poly(a_ and b_) is holder of polymonial root of a and b, where a and b are roots of polymonial,
poly() can be activated by evaluate();