---Definition---

An expression that contains other expressions.

---Source---

Harvey, B., & Wright, M. (1999). Simply Scheme - 2nd Edition: Introducing Computer Science (2nd ed.) [E-book]. The MIT Press.

---Synonyms---

Complex Expression

---Example---

Is it true that (- 6 3) is a complex expression in Lisp? Why?

Yes, because it contains the expressions -, 6, and 3.

---Example---

Is it true that x or y is a complex expression in Python? Why?

Yes, because it contains the expressions x, or, and y.

---Template---

Is it true that ________ is a complex expression in _______ ? Why?

Yes, because it contains the expressions ________ and _________.

---Notes---

You can make text look like code by wrapping it in back quotes (`).
This is the first post with curly braces representing sets of knowledge.