Issue with 278 Use of Lagrange multipliers Context 2

[philsMINT]

set of tensors?
Link to Use of Lagrange multipliers Context 2, qID 278

[AndreG-P]

Is it a single expression or a list of two? If it's a list, just pick one randomly (see other list cases with multiple equations or relations).
If it is a single expression, create a new macro to describe the parent node,probably the comma?