3.1. Rounding Numerical Values3.2. Performing Accurate Decimal Calculations3.3. Formatting Numbers for Output3.4. Working with Binary, Octal, and Hexadecimal Integers3.5. Packing and Unpacking Large Integers from Bytes3.6. Performing Complex-Valued Math3.7. Working with Infinity and NaNs3.8. Calculating with Fractions3.9. Calculating with Large Numerical Arrays3.10. Performing Matrix and Linear Algebra Calculations3.11. Picking Things at Random3.12. Converting Days to Seconds, and Other Basic Time Conversions3.13. Determining Last Friday’s Date3.14. Finding the Date Range for the Current Month3.15. Converting Strings into Datetimes3.16. Manipulating Dates Involving Time Zones