What should be done first to simplify 11 – 2 + 7 + 5 – 8 + 13

Ineed me i stuck and i don’t want to get it wrong

Factor the polynomial. b^2 + 4b + 4

Which statement is true about the local minimum of the graphed function? over the interval[-4,-2], the local minimum is 0. over the interval [-2,-1] , the local minimum is 25. over the interval [-1,4], the local minimum is 0. over the interval [4,7], the local minimum is -7