# Real, complex, and infinite results from Integrate[] for like inputs

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 I've been working with Mathematica for symbolic calculations, primarily Integrations. The following is a function I am trying to integrate with the shown assumptions: Integrate[(50 (0.000258748 + 0.117362 Vch^2) (23 + (84 Vch)/Sqrt[ 1 + 776.46 Vch^2]) (1 + ( 0.76354 (2 + 2329.38 Vch^2 + 1.20578*10^6 Vch^4))/(1 + 776.46 Vch^2)^(3/2)))/(1 + Vch^2), Vch, Assumptions -> {Vch != 0, Element[{Vch}, Reals]}] However, I am getting various results for the output of the function depending on multiple criteria:1)If I expand the above function before applying it to Integrate[], I get 1/0^2 infinity errors.2) If I do not expand the function and leave it as shown above, the result are complex numbers3) If I expand the above function and manually integrate each term (since the terms are added to each other) I will get a real result, which is what it should be.I have to take multiple integrals similar to the one above. Taking each term after the expansions and Integrating each one is fine, but I think it's a roundabout solution.Does anyone have any ideas as to what is happening and what steps I could take to get a real solution?Thanks!