Answer :
Step-by-step explanation:
s+u
Add t: You will need to introduce brackets
(s+u) + t
Add v: Introduce another v
((s/u) + t) + v
Step-by-step explanation:
s+u
Add t: You will need to introduce brackets
(s+u) + t
Add v: Introduce another v
((s/u) + t) + v