Jack will be driving to London next Tuesday.

[Alice Chu]

Do the following sentences express the same thing?
1) Jack will drive to London next Tuesday.
2) Jack is going to drive to London next Tuesday.
3) Jack is driving to London next Tuesday.
4) Jack will be driving to London next Tuesday.
5) Jack drives to London next Tuesday.

 

[Charlie Bernstein]

Do the following sentences express the same thing?
1) Jack will drive to London next Tuesday.
2) Jack is going to drive to London next Tuesday.
3) Jack is driving to London next Tuesday.
4) Jack will be driving to London next Tuesday.
5) Jack drives to London next Tuesday.

Yes. Number 5 would only be likely in a few contexts — for instance, if you're making or referring to a plan or schedule.

 

[5jj]

Do the following sentences express the same thing?

They refer to the same situation, but do not 'mean' the same thing.

Some of the differences between the various ways of expressing the future are explained here: https://www.usingenglish.com/teachers/articles/ways-expressing-future-in-english.html