[GiNaC-list] I want to Add Integrating by Parts in GiNaC Symbolic Integration

Dear all, I just learned about GiNaC, and I want to add integration by parts for a bit of complex integration like integral of *cos nx * x*, for definite and indefinite integral. I think polynomial integration in GiNaC works amazing, but if we can add all other symbolic integration it will be better. Should I look and modify the source code *integral.cpp*? I never really modified open source code before in my life. Thanks.