Every once in awhile I stumble upon a resource that is too good not to share. I get a large number of email asking for specific problems in math to be solved. However, due to the large volume, it's helpful when users post their questions to the forum as there are many outstanding math contributors to help out. Also, you may be interested in this resource where you can submit your specific problem and receive the answer within a reasonable amount of time. AND, best of all, it too is free.