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i) [84+(630:6x4)-(312:8x2)-298]:(8x864:108)=

Răspuns :

[84+(630:6x4)-(312:8x2)-298]:(8x867:108)=
=[84+(105x4)-(39x2)-298]:(6936:108)
=(84+420-78-298):64,2
=(84+342-298):64,2
=(426-298):64,2
=128:64,2
=1.9