-9-8-7-6-5-4-3-2-1+1+2+3 = (-9-1)+ (-8-2) + (-7-3) + (-6-4) - 5 + 6 = -10 -10 -10 -10 +1 = -39
-9+-8+-7+-6+-5+-4+-3+-2+-1+1+2+3=−39
-9-8-7-6-5-4-3-2-1+1+2+3 = (-9-1)+ (-8-2) + (-7-3) + (-6-4) - 5 + 6 = -10 -10 -10 -10 +1 = -39
-9+-8+-7+-6+-5+-4+-3+-2+-1+1+2+3=−39