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(-1+2-3+4)×(-10-9+11+8)

Răspuns :

( - 1 + 2 - 3 + 4 ) x ( - 10 - 9 + 11 + 8 ) = 0

= ( - 2 + 4 ) x ( - 19 + 19 ) =

= 2 x 0 =

= 0