It looks like you’re asking about the meaning of the plus sign (+). In math, the plus sign means addition, which is putting numbers together to get a bigger number. For example, 3 + 2 = 5.Outside of math, the plus sign can also mean something positive, extra, or added. For example, when people say “this is a plus,” it means it is a good or extra benefit.Can you tell me what you mean by “last sign”? Do you mean the minus sign (–) or another symbol[tex]?[/tex]