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[81:9+7*(2:2+6):7]:2

Răspuns :

[81:9+7*(2:2+6):7]:2=
[9+7*(1+6):7]:2=
[9+7×7:7]:2=
[9+49:7]:2=
[9+7]:2=
16:2=
8
[81:9+7*(2:2+6):7]:2
=[81:9+7*(1+6):7]:2
=[81:9+7*7:7]:2
=[81:9+49:7]:2
=[9+7]:2
=16:2
=8