Invariants of five-order homogeneous dynamical systems with dissipation

New cases of integrable dynamical systems of the fifth order homogeneous in terms of variables are obtained, in which a system on a tangent bundle to a two-dimensional manifold can be distinguished. In this case, the force field is divided into an internal (conservative) and an external one, which has a dissipation of a different sign. The external field is introduced using some unimodular transformation and generalizes the previously considered fields. Complete sets of both first integrals and invariant differential forms are given.