1-2+3/4*56+789=830
12*3+4-5+6+789=830
12+3+4*5+6+789=830
1-2+3+45-6+789=830
1+2*3+4+5*6+789=830
12+3-4+5*6+789=830
1-2+3*4+5*6+789=830
123+4*5+678+9=830
12+3*45*6+7-8+9=830
1+2*3+4*5*6*7-8-9=830
123+4-5+6+78*9=830
1-2+3*45-6+78*9=830
1+2*345+67+8*9=830