Hi, I want to do the double integration of the following function:

Integrate[(-1)*(x + l/2)/((x + l/2)^2 + (y - y1)^2 + (z - z1)^2)^(3/2),{y1, 1,2},{z1,3,4}] 

But, I am not getting any results. Mathemetica is saying the following things
"This computation has exceeded the time limit for your plan.\

$Aborted.

I have attached the screenshot of this here.
Any suggestions regarding solving this complex double integral will be appreciated. Thanks.