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5×3÷3-4×54-24÷2+5-20

Răspuns :

5×3:3-4×54-24:2+5-20=
=15:3-216-12+5-20=
=5-216-12+5-20=
= -211-12+5-20=
= -223+5-20=
= -218-20=
= -238