Consider the following premises. w_3 or ~q_2. q_2 or t. w_3 <-> t. Can we infer w_3 from them?
 From w_3 <-> t we can infer t -> w_3. From w_3 or ~q_2 we can infer q_2 -> w_3. Finally, from q_2 -> w_3, t -> w_3, q_2 or t we can infer w_3. Therefore, the answer is yes.