Сколько будет
(7-{-1-[3-(2-5)]+3}-2)

(7-(-1-(3-(2-5))+3)-2)=

(7-(-1-(3-(-3))+3)-2)=

(7-(-1-(3 + 3))+3)-2)=

(7-(-1 - 6+3)-2)=

(7-(-4)-2)=

7 + 4 - 2=

9