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The cross-section of (quasi-)elastic large-angle electron-positron scatteringat high energies is calculated. Radiative corrections of the orders O(\alpha^2L^2) and O(\alpha^2 L), besides pure two-loop box contributions, are explicitlycalculated. In the second order we considered the following sources ofcorrections: 1) Virtual photonic corrections coming from squares of 1-looplevel amplitudes and their relevant interferences (vertex-type and box-typeFeynman diagrams). 2) Double soft photon emission and one-loop corrections tosingle soft photon emission. The results are presented in an analytical form.Comment: 14 pp, LaTeX 2.09, typos fixed, submitted to Int.J.Mod.Phys.

SECOND-ORDER CONTRIBUTIONS TO ELASTIC LARGE-ANGLE BHABHA SCATTERING