Tips & solutions
- Exercise #2 (tips and solutions)
- Exercise #6 (tips and solutions)
- Exercise #7 (tips and solutions)
- Exercise #8 (tips and solutions)
- Exercise #10 (tips and solutions)
- Exercise #11 (tips and solutions)
- Exercise #15 (tips and solutions)
- Exercise #16 (tips and solutions)
- Exercise #17 (tips and solutions)
- Exercise #18 (tips and solutions)
- Exercise #23 (tips and solutions)
- Exercise #26 (tips and solutions)
- Exercise #27 (tips and solutions)
- Exercise #30 (tips and solutions)
- Exercise #46 (tips and solutions)
- Exercise #37 (tips and solutions)
- Exercise #39 (tips and solutions)
- Exercise #151 (tips and solutions)
- Exercise #(-2) (tips and solutions)
- Exercise #70 (tips and solutions)
- Exercise #51 (tips and solutions)
- Exercise #53 (tips and solutions)
- Exercise #54 (tips and solutions)
- Exercise #55 (tips and solutions)
- Exercise #56 (tips and solutions)
- Exercise #57 (tips and solutions)
- Exercise #59 (tips and solutions)
- Exercise #60 (tips and solutions)