I am looking for professional help to verify some results I am working on and maintaining in a write-up. However, I can't get anyone for free since I was forced to leave my old university, Case Western Reserve, (due to disagreements) and I don't know if I can find an online program that assists undergraduates in their research (I should have graduated my senior year with a bachelor's degree but am technically a freshman. I have studied rigorously up to differential equations; It's complicated). Moreover, professors are busy and would most likely ignore my requests no matter how much money I offer.
Therefore, is there a way to pay for professional research help? How can I receive feedback on what I am working on?
Details: My field is mathematics. I think the work may be complicated enough that graduate students won't be able to rigorously answer everything. I need someone with a Ph.D. on the level of professors. (Technically, I am working on developing a finitely additive measure and sum that takes the average of functions defined on countably additive measure zero sets. I am looking to verify if my measure and average on a function gives in fact what I am looking for. For reference, the link to my pdf is here).