Help with the "Replace" Function!!

Please help me to change these filenames with the "Replace" Function or another functions..
It's difficult to me to find the correct "sign" for it.

Example Original Filenames:

50 Cent - Amusement Park (88 Bpm) (X-Mix Urban Series Issue 104 - 2007)
50 Cent Ft. Akon - I Still Kill (89 Bpm)
Ali & Gipp - Go Ahead (93 Bpm) (Funkymix 98)

To:

50 Cent - Amusement Park (X-Mix Urban Series Issue 104 - 2007)
50 Cent Ft. Akon - I Still Kill
Ali & Gipp - Go Ahead (Funkymix 98)

I mean that i want to Remove the BPM (??? BPM) INFORMATION...
Thanks All

Action type: Format value
Field: _FILENAME
Formatstring: $regexp(%_filename%,\s*(\d+ Bpm),)

Thank You!!! you realy helped me!!!