Tasker Date/Time Calculations against 72h mark (from time-stamp)

[Razvan Baban]

I have this:

Task: Task Demo

A1: AutoSheets Get Cell [
Configuration: Spreadsheet ID: Sheet ID
Sheet Name: Demo Sheet Name
Cell Reference: F1
Output Name: timestamp
Timeout (Seconds): 60
Structure Output (JSON, etc): On ]

A2: If [ %timestamp ~ *AB* ]

A3: Flash [
Text: Huurayyy
Continue Task Immediately: On
Dismiss On Click: On ]

A4: Else
If [ %timestamp !~ *AB* ]

A5: Flash [
Text: Try again
Continue Task Immediately: On
Dismiss On Click: On ]

A6: End If
I've used some placeholders for A3 and A5.

Let me explain what I need. In the F1 cell I will have either empty or something like this: "AB - 12:35 / 19 Nov / 2022" (without the quotes obv) whereas  12:35 / 19 Nov / 2022 represents a time stamp generated by another task which works very well.

What I want to do and I got stuck:

In A3 I want a calculation based on the time stamp: Calculate if the difference from F1 cell is > or < than 72 hours. If it is greater then do "X" if is less than 72h do "X"

Any solution guys how to go about the calculation?