How to convert list into polynomial? reverse of args()

> Thanks for the last answer. I need to convert a list into the polynomial.
> Basically I need to revert the operation of args() e.g.
> [f(x),f(y),f(z),....] convert to f(x)*f(y)*f(z)*... and the operator can
> be anything e.g. +,-,etc.
>

To convert a list of *coefficients* to a polynomial:

          coeff: [3,4,5]$
          sum(coeff[i+1]*x^i,i,0,length(coeff)-1);
              => 5*x^2+4*x+3

To convert a list of *terms* to a polynomial:

         terms: [3, 4*x, 5*x^2 ]$
         apply("+", terms)
or
         sum(terms[i],i,1,length(terms))

To convert a list of *factors* to a polynomial:

         factors: [(x-1), (x-3) ]$
         apply("*", factors);
or
         product(factors[i],i,1,length(factors))

You can expand the product with rat(...) or expand(...).