2*5-7=96/48+1=3
( 2)乘(5 )减( 7 )= 96 除( 4 )( 8 )加( 1 )=( 3 )
1*7-2=96/48+3=5
( 1)乘(7 )减( 2 )= 96 除( 4 )( 8 )加( 3 )=( 5 )