Which simplifys to a+ b? a-(1-b)+1 -(1-a)-b+1 (a--1) -1)+1

  see below

Step-by-step explanation:

Use the distributive property to eliminate parentheses. Remember that the product (-1)(-1) is 1.

a-(1-b)+1 = a -1 +b +1 = a + b . . . . this one

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-(1-a)-b+1 = -1 +a -b +1 = a - b

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(a-1)-(b-1) = a - 1 - b + 1 = a - b

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a-(-b-1)+1 = a +b +1 +1 = a + b + 2

hello i am doing good for you that it's summer in your country or state ; )

btw in my country we just have sun and rain as (because i live in the caribbean lol)

also, thx a lot for the points : )