Question

( 42 - 69 -17 ) - ( 42 - 17 ) =?

Answer 1

(42-69-17) - (42-17)

= 42 - 69 - 17 - 42 + 17

= -69

..

Answer 2

(42-69-17)-(42-17) = 42-69-17-42+17 = -69

Answer 3

      

[ 42 - 69 - 17 ] - [ 42 - 17 ]

= 42 - 69 - 17 - 42 + 17

= [42-42] + [17-17] - 69

=0 + 0 - 69

= -69