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We present results for the corrections of order alpha^2 (Z alpha)^5 to theLamb shift. We compute all the contributing Feynman diagrams in dimensionalregularization and a general covariant gauge using a mixture of analytical andnumerical methods. We confirm results obtained by other groups and improvetheir precision. Values of the 32 master integrals for this and similarproblems are provided.

Radiative-nonrecoil corrections of order alpha^2 (Z alpha)^5 to the Lamb shift