" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
= 1 - a - [ 1 - a + 1 - 2a - 1 + 3a ] - a - 1 = 1 - a - 1 + a - 1 + 2a + 1 - 3a - a - 1 = -1 -a