Question

5+{-4+[-6+(-2+4)-5]+2}

Answer 1

$5+[-4+[-6+(-2+4)-5]+2]\\5+[-4 + [-6 + 2 - 5] + 2]\\5+ [-4+[-4 - 5] + 2]\\5+[-4 + [-9]+2]\\5+ [-4-9+2]\\5+ [-13 + 2]\\5+ [-11]\\5-11\\-6$