$$ S = \sum_{i=1}^{n} \frac{x_i}{N}$$
${\LaTeX{}}$: FUBAR NOT
The title is the “fairness equation”. I will leave you to google that.
In entire history of computer software, only one man succeeded in writing a program to typeset mathematics on both paper and screen. Remarkably that software:
- was bug-free.
- was so challenging that it has not been bettered.
- has always been free to use.
To summarise: One man wrote the best program ever written, for free.