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  • $\begingroup$ Dear Roman! Thank you for your answer! Is there a way to get rid of a complex part of a expression? Or to get complex and real part of this expression? $\endgroup$ Commented Dec 4, 2020 at 18:10
  • $\begingroup$ @CroSimpson2.0 indefinite integrals (antiderivatives) include an arbitrary offset constant, which may be complex-valued. If you don't like the offset constant, you can modify it as you wish. For example, evaluate the imaginary part and subtract it. Alternatively, if you compute a definite integral you won't get any imaginary parts. $\endgroup$ Commented Dec 4, 2020 at 18:18
  • $\begingroup$ How can I get imaginary part of this expression? $\endgroup$ Commented Dec 4, 2020 at 18:40
  • $\begingroup$ Aren't you rather looking for a definite integral at the end? If you are, then that's going to be much easier than figuring out the story of the six integration constants. $\endgroup$ Commented Dec 4, 2020 at 19:14
  • $\begingroup$ Yes I am. But to calculate the value of a definite integral I am using the symbolic expression, i.e. antiderivative. $\endgroup$ Commented Dec 4, 2020 at 20:45