Shared Worksheet Problem

I have excel workbook, it has two worksheets. The first worksheet is allowed user to enter data and view the result. The second worksheet has all the formulas, it calculates based on data enter from the first worksheet.

Everything is working fine MS Excel(desktop), now I want to share workbook using Zohosheet. But I don't want to allow user to download/export/save as our excel workbook.

The other problems I am facing with shared workbook are:

1) All hidden worksheets are visible after exporting shared workbook. (Even I used sheet based permission)
2) All formulas are visible.

I protected and hide worksheet before uploading the workbook to Zohosheet but still after exporting workbook to computer - user can see formulas and hidden worksheets. Please let me if I am missing something or let me know how can I hide and protect worksheets.

Thank you.