1-2+3-4-56+789=731
1+2+3*45*6+7-89=731
123-4-5-6+7*89=731
12+3+4+56/7*89=731
1*23-4+56/7*89=731
1*2-3+45+678+9=731
1+23+4*5+678+9=731
1+2*3*4*5*6-7+8+9=731
1*2+3*4*5+678-9=731
1*2*345+6*7+8-9=731
1/2*3*456+7*8-9=731
12+3*4*56+7*8-9=731
1*2*345-6+7*8-9=731
1-23+45+6+78*9=731
1+23+4-5+6+78*9=731
12*3+4-5-6+78*9=731
12+3+4*5-6+78*9=731
1-2*3+4+5*6+78*9=731
1*23*4+567+8*9=731
1234-5+6-7*8*9=731