Question

The simplification of ( 1 + 2 - 3 ) + ( 4 +5 - 9) + ( 6 + 7 - 13 ) + ( 8 + 9 - 17 ) + ( 12 + 13 - 25 ) gives​

Answer 1

0+0+0+0+0=0
hope you got your answer

Answer 2

Solving each bracket seperately gives us zero, so sum of all brackets having internal value has zero will give us the answer zero.