  All scalar master integrals (MIs) for massive 2-loop QED Bhabha scattering
are identified. The 2- and 3-point MIs have been calculated in terms of
harmonic polylogarithms with the differential equation method. The calculation
of 4-point MIs is underway. We sketch some alternative methods which help to
solve (mainly) singularities of some MIs.

High Energy Physics - Phenomenology