What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? w <-> t_2. u -> t_2. forall x_7: R_7(x_7) <-> S_7(x_7). S_7(a_7) <-> u. ~w.
w -> t_2. S_7(a_7) -> u. t_2 -> w. u -> S_7(a_7). ~t_2. forall x_7: R_7(x_7) -> S_7(x_7). forall x_7: S_7(x_7) -> R_7(x_7).