1+2-3+4*56+7+89=320
1+234-5-6+7+89=320
1/2*34+56*7-89=320
1-2/3*456+7*89=320
12-3+4*56+78+9=320
1*234+5-6+78+9=320
1*2-34+5*67+8+9=320
1+23*4+5*6*7+8+9=320
1-2*3-4*5+6*7*8+9=320
12*34+5-6-78-9=320
1*2*3*45+67-8-9=320
1+2+3-4+5*67-8-9=320
1*2*3-4+5*67-8-9=320
123+4+5*6*7-8-9=320
1-2+3-4-5+6*7*8-9=320
1*2+34*5*6-78*9=320
1-2-3+4+56*7-8*9=320
12/3-4+56*7-8*9=320
12-3*4+56*7-8*9=320
12/3/4*56*7-8*9=320