Template:Sum/doc

Usage
This template performs addition. For example, if you want to add 2 and 3, use this:, which creates 5. It handles positive and negative integers, fractions, and decimals to thirteen decimal points:
 * produces: -2
 * produces: 1.5
 * produces: NaN

It also handles some symbols such as "pi" ($\pi$) or "e":
 * produces NaN
 * produces NaN

More than two parameters may be employed:
 * produces 2

It does not accept commas or spaces for thousands separator.