Question

-2+(4-5+2)-3-{1-[6+(-3-1)-(-2+4)]+3-4)

Answer 1

-2+(6-5)-3-{1-[6+(-4)-2]-1}
-2+1-3-{1-[6-4-2]-1}
-1-3-{1-[2-2]-1}
-4-{1-0-1}
-4-0 = -4.