I made a puzzle I've not seen before.
Take 6 figures out of a cohort of 9. The cohort here is { -4, -3, -2, -1, 0, 1, 2, 3, 4}

6
-2,+,a1a2b2
12,*,b1c1
0,+,d1e1
4,*,f1f2f3
12,*,c2c3d3
8,*,d2e2e3
7,-,a3b3a4
0,+,b4c4
-1,+,d4e4
12,*,f4f5
-2,/,a5b5
1,+,c5d5c6
12,*,e5e6
8,*,a6b6
-1,d6
1,f6

Great, thanks

This is the puzzle:

I would like to know if this puzzle is nice.
It should be solvable with only simple logic. But you have to make a deeper choice: which digits do not fit?? Only 6 out of 9 are used.

It was really fun to find out which numbers were used. Having found your clues, the puzzle was quite easy to solve.