TOPIC: Any differnces in those sentences in meaning?

Could you please tell me if the following sentences have any differences in meaning?
1)I'll try to get Mark to pay me back for the camera little by little.
2)I'll try to ask Mark to Pay me back for the camera little by litlle.
3)I'll try to make Mark pay me back for the camera little by little.

In your sample sentences, there is very little different as you use "I will try". However, I shall explain the differences if we are just focusing on the prepositional verbs.
To ask somebody to do means to request. This would be of course the most polite way of getting what you want.
To get somebody to do would mean that you are ordering them.
To make somebody do means you are ordering them as well, but implies the juse of force.
This would be the strongest way of getting what you want.
I hope this helps.