Squat - hard to judge depth. Head could look down.
Bench - don't bounce off the chest. Bring it down controlled and let it touch your chest not bounce off it. Don't breathe on the way down. Breathe at the top.
Deadlift - think the bar should be closer to the shins on the way up and the bar path has some curve to it, but heavier weights will fix that. Also try not to look sideways to check out your back position when you are lowering the weight. Not a good practice to get into if you don't want to tweak your neck.
Keep it up though. I assume you have the book.