This question's answer is "feel" instead of "to feel". But in this kind of common or parallel relationship with "to experience", can either "feel" with the omission of "to" or "to feel" work?
uni8-6)The pressure and stresses of mordern life can cause many of us to experience depression and [feel / to feel] less motivated and excited about our lives. Adaptability is the key to successful managing these unavoidable aspects of life today. Smoking or drinking a