- Fraction term cancellation now has priority over constant multiplication.
- Some other issues had already been resolved.

Application in parser now also applies implicit rules that are not hints after applying an explicit rule.

- Division now has a higher precedence than multiplication.
- Integrals and derivatives now have a precedence higher than addition, but
  lower than multiplication.
- 'a2' is now translated to 'a * 2' instead of 'a ^ 2'.