Add "i1" utility function.
Remove unnecessary parentheses.
Add "concat" operation.
Make "operate" a module-level function.
Start adding string operations.
Add more string operations.
Add "length" operation.
Add "eq" and "neq" operations.
Add more conversion operations.
Add comparison operations.
Add arithmetic operations.
Move some of the more interesting operations to the top.
Move "operate" function to the end of the module.