50×255÷5+[{117÷1×5-(10×3)}]
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=50×225÷5+[117÷13×5−(10×3)
=50×225÷5+[117÷13×5−(30)
=50×225÷5+[9×5−30]
=50×225÷5+[45−30]
=50×225÷5+15
=50×45+15
=2250+15
=2265
hope you understood
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