I have a long expression that involves different complex numbers. I want to force *Mathematics* to replace `Conjugate[z]`

by `ABS[z]^ 2`

Without using polar coordinates in the whole expression. For example,

```
z w conjugate[z] Conjugate[w] + Conjugate[z] w + z ^ 2
```

it should only be simplified & # 39; to

```
ABS[z]^ 2 Abs[w]^ 2 + Conjugate[z] w + z ^ 2
```