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We present the expansion to the expectation value coupled cluster theory(XCC) to the wavefunctions that include the inter electronic distances $r_{12}$explicitly. We have extended our algebraic manipulation code \paldus to dealwith the rems arising in the CC-F12 theory. We present the full workingexpressions for the one-electron density matrix (1RDM) and cumulant of thetwo-electron density matrix ($\lambda$-2RDM) in the framework of XCC-F12theory. We discuss the possible approximations the expressions.

F-12 density matrices and cumulants from the explicitly connected coupled-cluster theory