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2x500-{80+{247x4-801:9}-300}=

Răspuns :

2×500-{80+{988-89}-300=
2×500-(988-89)-300=
2×500-{80+599}-300=
2×500-679=
1000-679=
303
2×500-[80+(988-801:9)-300]=
2×500-[80+(988-89)-300]=
2×500-(80+899-300)=
2×500-(979-300)=
2×500-679=
1.000-679=
=303