Resposta:

12,625

Explicação passo-a-passo:

(-2-3)²:(-25)-[45-(-10+6)³:(-2)³] =

( - 5 )² : - 25 - [ 45 - ( - 4)³ : ( -2×-2×-2 ) ] =

( -5×-5 ) : - 25 - [ 45 - ( -4×-4×-4 ) : ( 4×-2 ) ] =

25 : - 25 - [ 45 - ( 16×-4 ) : - 8 ] =

25 : - 25 - [ 45 - ( - 64 ) : - 8 ] =

25 : - 25 - [ 45 + 64 : - 8 ] =

25 : - 25 - [ 109 : - 8 ] =

25 : - 25 - [ - 13,625 ] =

25 : - 25 + 13,625 =

- 1 + 13,625 = 12,625