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{1+[25-3x(12x4-40)]x5}x4=

Răspuns :

{1+[25-3×(12×4-40)]×5}×4=
{1+[25-3×(48-40)]×5}×4
[1+(25-3×8)]×5}×4
[1+(25-24)]×5}×4
(1+1×5)×4
(1+5)×4=6.4=24