All solving procedures must meet what we call our 4C requirements, which are the mandatory minimum qualities for a solution to be accepted.
All the steps of the solving procedure and the result must be mathematically correct.
The explanations must be complete - all the questions from the task have to be answered in full.
The explanation must be clear: well-structured, simple, easy to follow and understand.
Solutions must be written in a way that respects copyright and intellectual property.