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+- Review
+- Functions
+  - if
+  - Multi clause functions
+    - with guards
+  - function type signature
+- Lists
+  - more functions on lists
+  - list comprehensions
+- More function syntax
+  - where
+  - let
+  - case
+- Homework: https://www.seas.upenn.edu/~cis194/spring13/hw/01-intro.pdf