Apply df_mend__df_sdrg__df_cytp__df_topsep__df_toplnd__df_rcl__df_he__ax_frege1__ax_frege2__ax_frege8__ax_frege28__ax_frege31__ax_frege41__ax_frege52a__ax_frege54a__ax_frege58a__ax_frege52c__ax_frege54c with
∀ x0 x1 x2 x3 : ο . wb x0 x1 ⟶ wif x0 x3 x2 ⟶ wif x1 x3 x2.