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4750-[17+23*3-(34*2+123*3)+10*5+9]-4000=

Răspuns :

4750-[17+69-(68+369)+50+9]-4000
4750-(86-437+59]-4000
750-292=
458 cred
4750-[17+69-(68+369)+50+9]-4000= mai intai faci paranteza rotunda apoi paranteza patrata desfaci parantezele si ontii 750-292=458
succes