how to convert these 7-segment decoder to boolean expression

how to convert these 7-segment decoder to boolean expression??

  BCD              7-Segment decoder     
A B C D            a b c d e f g
0 0 0 0            0 0 0 0 0 0 1
0 0 0 1            1 0 0 1 1 1 1
0 0 1 0            0 0 1 0 0 1 0
0 0 1 1            0 0 0 0 1 1 0
0 1 0 0            1 0 0 1 1 0 0 
0 1 0 1 开发者_高级运维           0 1 0 0 1 0 0 
0 1 1 0            0 1 0 0 0 0 0 
0 1 1 1            0 0 0 1 1 1 1 
1 0 0 0            0 0 0 0 0 0 0 
1 0 0 1            0 0 0 0 1 0 0

I suggest you use a karnough map.

You'll need to use one for each result column, so 7 4x4 tables.

There are even a few karough map generators on the web that you can use.