Python function names should be snake case, not camel case.

I think you need to explain more in the description about the task. Does the order of the digits matter? What constitutes a valid equation? Are digits supposed to be parenthesised? Are digits able to be concatenated? You should include in the desription a working example for one of the sample tests and include the specifications of the kata.

For example, and this is based on the sample tests:

digits = 1906
expected 7 instead got 30

I count at least the following:

1+9+0*6
1+9+0/6
1+9-0*6
1+9-0/6
1+9+6*0
1+9-6*0
1+0*6+9
1+0/6+9
1-0*6+9
1-0/6+9
1+6*0+9
1-6*0+9
9+1+0*6
9+1+0/6
9+1-0*6
9+1-0/6
9+1+6*0
9+1-6*0
9+0*6+1
9+0/6+1
9-0*6+1
9-0/6+1
9+6*0+1
9-6*0+1
0*6+1+9
0/6+1+9
0*6+9+1
0/6+9+1
6*0+1+9
6*0+9+1

Give it a shot without using buit in sorting functions :)

This is not enforced; enforce it, or remove it.

• There's alr a lot of katas about sorting (Refer to https://github.com/codewars/content-issues/issues/39 -> sorting strings or array) Even though builtin is really disabled, it adds nothing new as we already have This kind of tasks and more

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