Second-order contributions to elastic large-angle Bhabha scattering

The cross-section of (quasi-)elastic large-angle electron-positron scattering at high energies is calculated. Radiative corrections of the orders phi(alpha(2)L(2)) and phi(alpha(2)L), except pure two-loop box contributions, are explicitly calculated. In the second order we considered the following sources of corrections: (a) virtual photonic corrections coming from squares of one-loop level amplitudes and their relevant interferences (vertex-type and box-type Feynman diagrams); (b) double soft photon emission and one-loop corrections to single-soft photon emission. The results are presented analytically.