Trolls shouldn't be able to patent laws of motion or gravity, established math or physics relationships, or natural biological sequences like DNA. Merely expressing established ideas as computer functions or models is stiil nothing more than a model, not original. If you discover a new short-cut method of computing pi, you can publish, not patent, and expressing it software adds nothing but speed and convenience. Hopefully, this will curb some of the more absurd patents granted by a Patent Office that seems to be in it way over its antediluvian head.