"+" function:

• Can also be called as nas_add

• Can also be called as nas_plus

If all the arguments are numbers as string number, add them.

Examples:

• running: ("+" "1", "3") will give: "4"

• running: ("+" "1", "10", "-4.1", "0.1") will give: "7"

• running: ("+" "1e999", "1e999", "4e999") will give: "6e+999"

• running: ("+" "1", "3", "text") will return nothing

• running: ("+" "1", "3", []) will return nothing