Some students are using the second edition in classes that have adopted the third edition. Many of the third-edition exercise can be found in the corresponding chapter in the second edition. The correspondence between Chapter 7 of the third edition and the second edition is especially tricky:

Third Edition Second Edition
7.2-7.5 7.2-7.5
7.8-7.10 7.8-7.10
7.15-7.19 7.15-7.19
7.21 8.6
7.23 8.9
7.24-7.30 7.20-7.26
7.38 7.32
7.45-7.47 7.38-7.40
7.49 7.42
7.57-7.61 8.17-8.21
7.64-7.65 8.25-8.26
7.68-7.70 7.50-7.52
7.71 7.54
7.72 7.53
7.74 7.55
7.79 7.59
7.90 7.70

For reference, the complete set of third-edition exercises is given in the following files. Permission is given to copy these files for personal use. Permission expressly is not given to publish these files, in either original or modified form, in printed, electronic, or any other format.

Third-edition exercise pages (.pdf files)