How to compute or simplify this integration?

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Any hints on solving an integration of the following form,

$$\int_{x}^{+\infty}\left(1-\frac{1}{1+sy^{-1}}\right) \left(\text{exp}(-\sqrt{y})+ y^{-\frac{1}{2}}(1-\text{exp}(-\sqrt[4]y)\right)dy $$

This arises pretty much in Poisson point processes after using the probability generating function property.

I know the above looks pretty much hopeless, I tried using Mathematica and Wolfram Alpha, both don't really help much.

I also have $x>0$ and $s>0$ real numbers if that helps.

I tried the following Wolfram|Alpha input and it gives a result in terms of $i$ imaginary, I don't understand why.

Also is there any valid approximation for which I can say that this integral can be approximately upper and lower bound by? Thanks in advance for any help.