  Some typical kinetic energy integrals which arise in the application of
extended Hylleraas-configuration interaction (E-Hy-CI) function in the
framework of Rayleigh-Ritz method of variation, have been evaluated
analytically for two-electron atomic systems. Closed-form expressions for the
corresponding integrals which occur in the application of Hylleraas-CI
functions, have also been derived as special cases.
