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[2+(3·5-2·4)]:3+3:[2+(49:7-2):5]=​

Răspuns :

[2+(15-8)]:3+3:[2+(7-2):5]=

=[2+7].3+3:[2+5:5]=

=9:3+3:[2+1]=

=3+3:3=

=3+1=

=4