Apply df_mndo__df_ghomOLD__df_rngo__df_drngo__df_rngohom__df_rngoiso__df_risc__df_com2__df_fld__df_crngo__df_idl__df_pridl__df_maxidl__df_prrngo__df_dmn__df_igen__df_xrn__df_coss with
wceq ccm2 (copab (λ x0 x1 . wral (λ x2 . wral (λ x3 . wceq (co (cv x2) (cv x3) (cv x1)) (co (cv x3) (cv x2) (cv x1))) (λ x3 . crn (cv x0))) (λ x2 . crn (cv x0)))).