1+23*4+5*6+789=912
1234+5-6*7*8+9=912
12*3*45-6-78*9=912
1+2-3+4*5*6*7+8*9=912
12*3*4*5/6*7+8*9=912
123*4+5/6*7*8*9=912
12*34+567*8/9=912