Sum cells that contain alpha and numeric

[Hammer1]

I need a simple formula to sum cells that contain alpha and numeric

eg

A1: W + 9
A2: W + 15
A3: L - 12

There is a space either side of the '+' or '-' (plus or minus) symbol.

Any help

[NBVC]

So what is it we are summing?

[Ron Coderre]

Using
A1: W + 9
A2: W + 15
A3: L - 12

If I understand you correctly, you want to sum the values after the first letter in each cell.

If that's true, using your posted example, this regular formula does that:
B1: =SUMPRODUCT(--MID(SUBSTITUTE(A1:A3," ",""),2,4))

Using your posted data, that formula returns: 12
(+9+15-12)

Is that something you can work with?