The exclusive practice clause is not all that uncommon. If you plan to keep a side job, you should simply ask for approval to keep that job and get it in writing. Then you are good unless you want another side job or to change side jobs. Then you need that approved.
The continuing education I guess I can understand. You get $XX per year and if you leave before that year you pay it back.
This liquidated damages I've never seen before. I've had 90 day notice required, but never with a dollar amount attached to it. If you break a 90 day notice agreement, then the employer can do what? Take you to court for breach of contract and spend who knows how much money on this and how long it would take. I've never heard of anyone actually being sued for breach of contract for not sticking to their 30-60-90 notice requirement. I'm sure it must happen somewhere though. So, they are just skipping this step and asking for a set dollar amount upfront. I would try to get this out of the contract.