### Several variables, consider polynomail as polynomial only of X, group coefficients

Suppose I have variables `d`

, `e`

and `x`

and I somehow using symbolic calculation get polynomial like this:

```
9*d^2*e^2*x^2 - 36*d^2*e*x^3 + 18*d*e^2*x^2
```

I want sage to group coefficients at `x`

and consider my polynomial as polynomial only of `x`

, I want other variables to be no more than just parameters. In short I want to see something like this:

```
9*d*e^2*(d + 2)*x^2 - 36*d^2*e*x^3
```

Is it possible to exploit such an approach in Sage?

P.S. I shortened my example. In real life example it is not so easy to see such a grouping by hands.