Can the responses of several forms be integrated into a Google Sheets sheet?

I have several custom forms and I need the answers to be cracked into a single sheet of google sheets, how could this be done?

No, forms can be integrated with a single sheet only, there is an importrange function that helps to import data from one spreadsheet to another, but I'm not sure if that works with multiple sheets, anyhow, the link to that function is here: https://support.google.com/docs/answer/3093340?hl=en 

I can see there are some methods as well to import data into a single spreadsheet, but note that this is something that should be worked on Google Sheets, not JotForm. 

Here are the links that might help you: 

https://productforums.google.com/forum/#!topic/docs/ZlhyAMmhJCI

http://infoinspired.com/google-docs/spreadsheet/consolidate-data-from-multiple-sheets-using-formula-in-google-sheets/ 

Thanks.