2.3 Symbolic Data Notes 2.3.1 notes 2.3.2 notes 2.3.3 notes 2.3.4 notes Exercises 2.3.1 Quotation ex2.53, ex2.54, ex2.55 2.3.2 Example: Symbolic Differentiation ex2.56, ex2.57, ex2.58 2.3.3 Example: Representing Sets ex2.59, ex2.60, ex2.61, ex2.62, ex2.63, ex2.64, ex2.65, ex2.66 2.3.4 Example: Huffman Encoding Trees ex2.67, ex2.68, ex2.69, ex2.70, ex2.71, ex2.72