Despite the wording of the closing reason, the question is off-topic in Super User as was mentioned by Mokubai, it might be on-topic in other Stack Exchange sitesites but I stronghly recomment that it be improved before posting it again.
NOTE: In relation to 3, 4 and 5, when asking "complex formulas" questions you should show that you know the basics about working with spreadsheet formulas and that your are familiar with the formula syntax, formula bar, the funcion list, by using the proper spreasheet / Google Sheets terms and showing the formulas that you have tried, the resulsts as well the error messages if there are any.
There are no restrictions regarding experienceexpertise level using Google Sheets (beginner, expertadvanced) but it's expected, as mentioned previously, that the asker have searched the site, and in this case including, the Google Sheets section in the Google Editors Help Center thoroughly before asking the question, and that the findings anand why they didn't meet the needs be shared in the question.
Note: You might find user asking to share a spreadsheet. This is up-to you, sharing the spreasheet doesn't replace the requirement to include all the relevant details directly in the question body as questions should be self contained whenever be posible (i.e. Excel files can't be attached).