When you hand-write code in an exam

Pro tip: think of a bracket as an S and a 2 on top of each other. Which one is on top of which will depend on whether you're writing an opening bracket or a closing bracket. Just try it out and you'll see which is which.

After you try it out, as another comment pointed out, think of your 2s and Ss as surrounding a circle. That way your traces get closer to the actual shape.