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nguyennguyet3798
2 năm trước
`a) {[ 200 + ( 50 - 30 ) ² ] - 456} : 12` `b) 311 : {210+[53+(37-25).2 ²]}` `c) ( 1/3 + 12/67 + 13/41 ) - ( 79/67 - 28/41 )`
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