Apply df_dir__df_tail__df_plusf__df_mgm__df_sgrp__df_mnd__df_mhm__df_submnd__df_frmd__df_vrmd__df_grp__df_minusg__df_sbg__df_mulg__df_subg__df_nsg__df_eqg__df_ghm with
wceq cplusf (cmpt (λ x0 . cvv) (λ x0 . cmpt2 (λ x1 x2 . cfv (cv x0) cbs) (λ x1 x2 . cfv (cv x0) cbs) (λ x1 x2 . co (cv x1) (cv x2) (cfv (cv x0) cplusg)))).