Depends a lot on how long you've been training, and what level of technique you have right now.
Assuming you can make some technical gains as well as strength wise gains, and assuming you're quite new to lifting I'd say you can increase by about 15-25% in 3 months, i.e. bench 60-65 kg etc.
I would suggest including leg exercises and avoiding the isolation exercises (hammer curls, raises) and also include some back exercises.
- Bench press
- Leg press
- Chin-ups/lat pulldowns
- Rows of all kinds
- Military press
Deadlifts and squats are both quite technical and should not be done if you're not very confident you have the right technique, but are very effective if you do.
I prefer these exercises since you save time by training multiple muscles at once (rows: back + biceps) and because you'll be training a movement that you might actually use in real life.