I am always second-guessing my calculations and to be honest multivariate calculus is not my strong point. Is it all right to post questions where you have done the derivations but would like more pairs of eyes to look at it?
I think this is fine, but with two caveats.
- You should probably add the
[self-study]tag, and be explicit about your situation. (Be sure to read its wiki as well.)
- It isn't clear from your description that there is a lot of statistical content to your proposed questions (I assume there is, or you wouldn't be asking here). Depending on how much of your question would be about the statistical aspect vs. how much would be just a double check on your math skills, it may be more appropriate to post your question on math.SE instead.
I feel like this question is almost a duplicate of this question.
I think this is a great idea, but as per Gung's suggestion in the above link, you may want to consider answering your own question rather than including the answer up front. Feedback can then be given through comments and if you are severely wrong another answer can be submitted.
You might want to consult your professor or the group that handles academic dishonesty at your institution. The way it works at our institution, this would classify as an unauthorized source of help that could lead to an honor code violation (academic sanction potentially leading to expulsion) unless the professor specifically said that you could work with others on the assignment.
If the professor says that it is OK to get help from others, you'll probably want to ensure that the scope of "others" is everyone and not just the professor, TAs, and classmates.