Apply df_fallfac__df_bpoly__df_ef__df_e__df_sin__df_cos__df_tan__df_pi__df_dvds__df_bits__df_sad__df_smu__df_gcd__df_lcm__df_lcmf__df_prm__df_numer__df_denom with
wceq cprime (crab (λ x0 . wbr (crab (λ x1 . wbr (cv x1) (cv x0) cdvds) (λ x1 . cn)) c2o cen) (λ x0 . cn)).