# Forcing Prime Notation

I want sage to implicitly differentiate a function for me, say

d/dx f(x)^2 = 2f(x)* f'(x).

I can do this by entering:

```
var('x')
f=function('f', x)
(f^2).diff(x)
```

This returns

```
2 f(x) D[0] (f) (x)
```

which is correct, but hard for me to read. Can I make sage return:

```
2 f(x) f'(x)
```

Thanks.