Today, I caught Sydney’s dreaded rail transport from Central to North Sydney. Jammed in like sardines, I sat on a small ledge near the stairs. Unfortunately, some fool had left a disposable coffee cup with liquid still in it and I happened to knock it over with my butt and caused a two people to get splattered with coffee. Sorry.

At my coffee shop post-hellish train ride, one of the girls was trying to determine some answers for her university maths bridging course. No problem! It’s not everyday you can make someone’s day by solving trigonometric and Taylor series problems.