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2la77:(2la5•2la10)la5+5•(352-350:2

Răspuns :

2 la 77:(2la5•2la 10)la 5+5•(352-350•2)=
=2la 77:(2la 15)la5+5•(352-175)=
=2la77:2la75+5•177=
=2la2+885=
=4+885=
=889