integration problem

alright guys, here's my problem

when you integrate d(X)/(1-X) = dP it's quite easy and the result is X=1-exp(-P)

now i'm wondering if you take X = X1+X2 and P = P1+P2 if the result is the same or not :S
i think it's not that simple
have fun

calculus sucks

Your question isn't very clear, so I can't help but maybe you could help yourself with http://integrals.wolfram.com/index.jsp

Yes I believe Mexicans should be allowed the same education opportunities that whites are.