73: Mainline

Typical Smalltalk implementations offer a host of arithmetic methods:

• Methods for basic arithmetic, such as +, -, *, /, negated, and reciprocal
• Methods for type conversion, such as asInteger and asFloat
• Methods for exponentiation, such as raisedTo:
• Methods for trigonometry, such as sin, tan, arcSin, and arcTan
• Methods for logarithms, such as ln (natural logarithm) and log: (base provided as argument)
• Methods for manipulating and dissecting floating-point numbers, such as round and truncated