I would like to do something simple as that

```
constr_expr = MathProgBase.constr_expr(m.d,i)
JuMP.addconstraint(m.model, constr_expr)
```

Looks like this:

```
JuMP.addNLconstraint(m, :($(x[1])*$(x[2])*$(x[3])*$(x[4]) >= 25))
```

would work but I don’t have the `$`

version of `x`

inside `constr_expr`

.

Getting a constraint and applying it to a model.

It doesn’t work because `constr_expr`

is of type `Expr`

which isn’t supported.

Never worked with `Expr`

so I’m a bit stuck.

Thanks in advance.