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[84+(630:6×4)-(312:8×2)-298]:(8×864:108)​

Răspuns :

[84+(630:6×4)-(312:8×2)-298]:(8×864:108)=

=[84+(105×4)-(39×2)-297]:(6,912:108)

=(84+420-78-297):64

=(504-78-297):64

=(426-297):64

=129:64

=2