I outsource, NOT your end customer.
One of my client is a PhD student. He is conducting his thesis nowadays.
He needs to find some searchable cases in [singular two boundary value problems and splines] to be his main research problem, also he needs proposing [suggesting] solution[s] for these three cases at least.
Kindly, freelancers, bid on if you could submit these cases and their suggesting solutions.
The criteria for accepting these cases and suggesting solutions if and only if the client conformed them. Sine this work wouldn't be worthable if it wasn't conformed by the client and his supervisor.
However, the freelancer who do submit conformed work, will have the chance to work with him till the client write the dissertations and graduate.
Kindly bid on reasonable price and you must submit your cases within a week from hiring date.