 ``` \(x + y_2 = 3\) This is inline. \[a + b = 6\] and this is display. ``` 1. Installed via Gemfile and bundle install. 2. `ruby 3.3.5 (2024-09-03 revision ef084cc8f4) [x86_64-linux]` 3. `jekyll (3.10.0)`