Google Sheets Automation Specialist Needed

I'm seeking an expert to develop a Google Sheet with complex functionalities. The sheet will require:

- Automated data entry from user input forms
- Implementation of complex formulas and calculations
- Ability to handle custom mathematical formulas

Ideal skills and experience:
- Advanced Google Sheets proficiency
- Experience with data automation from user inputs
- Strong background in developing and integrating complex formulas

Please share relevant experience.