1☺. 94×100_[13X (428:4-62)+(2×647)+(945:5-768:3:4)=
=9400-[13×(107-62)+1294+(188-256:4)=
=9400-(1391-62)+1294+(189-64)=
=9400-1329+1294+125=
=8071+1419=
=9490
2.☺ 945:[(720:5:6-6):2-488:8+567:7:9]×23=
= 945:[(144:6-6):2-61+81:9]×23=
=945:[(24-6):2-61+9]×23=
=945:[9-70]×23=
=105-70×23=
=35×23=805
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