- Andrew Jackson was the seventh president of the United States of America, serving from 1829 to 1837. He was also a living testament to how Badass a man can be (although Theodore Roosevelt certainly would argue with that statement).
- Summation (Wikipedia)
In mathematics, summation is the addition of a sequence of numbers, called addends or summands; the result is their sum or total. Beside numbers, other types of values can be summed as well: functions, vectors, matrices, polynomials and, in general, elements of any type of mathematical objects on which an operation denoted “+” is defined.