1/2*345*6-7*89=412
123*4-5-6-78+9=412
1*2-3+4+56*7+8+9=412
1+2*3-4+56*7+8+9=412
1-2+345+67-8+9=412
12+3+4+56*7-8+9=412
1*23-4+56*7-8+9=412
1*2-3*45+67*8+9=412
123+4*56+7*8+9=412
1+2*34*5+6+7*8+9=412
12/3+456*7/8+9=412
123*4-56-7-8-9=412
1+2+34+56*7-8-9=412
1/2*34*5+6*7*8-9=412
12-3-4+5*67+8*9=412
123+4*56-7+8*9=412
1+2*34*5+6-7+8*9=412
123*4+5-6-7-8*9=412
1*23*4+56*7-8*9=412
123*4-56/7-8*9=412
1-23*4+5-6+7*8*9=412