Brother, this is a formula: positive is positive, positive is negative, negative is negative, and negative is positive.

(Abbreviation: the same symbol is positive and different symbols are negative)

+(-2) is positive and negative. If you select 2, you will get -2 before putting the minus sign.

-(+ 1/3) is negative and positive. If you extract 1/3, you will get-1/3 before putting the minus sign.

-(-2.5) is negative and positive. If you select 2.5, you will get +2.5 before putting the plus sign.

+(+3. 14) means that what is correct is correct. If you select 3. 14, you will get +3. 14 before putting the plus sign.

(I hope to adopt it. If you don't know, add me QQ: 2498795430, as long as it is weekend. )