Eragiketa konbinatuak

( - 2 ) . [ 11 + 3 . ( 5 - 7 ) ] - 3 . ( 8 - 11 ) =
( - 2 ) . [ 11 + 3 . ( - 2 ) ] - 3 . ( - ____________________ ) =
( - 2 ) . [ ____________________ - 6 ] + 9 =
- ____________________ . 5 + 9 =
- ____________________ + 9 =
- 1