#1
Alright I wanna tab a bend such as play fret 14, bend it to 15 and back down to original note which is 14. Then play 14 once again.

is it shown as 14b15r14 - 14 ?
#3
I would write it as

|--14b(15)r14--14------------


but your version is fine, as long as there aren't any hyphens between the numbers people will recognise that it is part of the same strike.