#### Answer

r ↔ ~(p ᴧ q)

#### Work Step by Step

Let p. q and r represent the three simple statements obtained by breaking down the given complex statement. Thus,
p: I like the teacher.
q: The course is interesting.
r: I miss the class.
I miss class if and only if it’s not true that I both like the teacher and the course is interesting.
The symbolic representation is:
~(p ᴧ q): it’s not true that both I like the teacher and the course is interesting.
r ↔ ~(p ᴧ q): I miss class if and only if it’s not true that I both like the teacher and the course is interesting.