Classical gravity from loop amplitudes

We describe an efficient method for extracting the parts of $D$-dimensional loop integrals that are needed to derive observables in classical general relativity from scattering amplitudes. Our approach simplifies soft-region integration by judiciously combining terms before final integrations. demonstrate computing required black-hole second Post-Minkowskian order Einstein gravity coupled scalars. also confirm recent results at third regarding universality and high-energy behavior gravitational interactions maximal supergravity.