8*(9/(10-7))(8*9)/(10-7)8/((10-7)/9)(8/(10-7))*99*(8/(10-7))(9*8)/(10-7)9/((10-7)/8)(9/(10-7))*8
8×9÷(10-7)=24
9÷(10-7)×8
10-79/33X8
