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Do not ask math questions here!

When contacting us, choose the most appropriate subject and be as specific as possible.

1. Request a calculator/note: choose this, if you didn't find the topic you were looking for. Be specific and describe what exactly you want us to write about.
2. Technical problems with the site: choose this, if you have found that some part of site is not working as expected. Be specific and describe all actions you did before encountering the error.
3. Suggestions: choose this, if you know how to improve the site or you just want to suggest a section or category.
4. Typo/Mistake in notes or calculators: choose this, if you have noticed that a note or calculator has a mistake. Again, be specific!
5. Comments: choose this, if you want to comment on the site or its part.
6. Other: under this subject, write anything else.