How Much Weight Can I Lose If I Exercise 3 Hours Everyday For 2 Months?

Well i am subscribed to a gym and i want to lose weight before i go back to school. I go everyday and exercise about 3-5 hours. I do every kind of exercise for every part of the body. I also go to some dance class that they have there for 1 hour. I want to lose like 30 pounds. Is it possible to lose that in 2 months?