Hi,
I was trying to use:
integrate(Rational(1,4)*(1/(4-t)))

This was returning:
−14log(4t−16)

I was not expecting this result... I went to sympy gamma to see the steps 
and I saw that:

Antiderivative forms: 
<http://gamma.sympy.org/input/?i=integrate%28Rational%281%2C4%29*%281%2F%284-t%29%29%29#integral_alternate_fake>

   - integrate(1/(4*(-t + 4)), t)
   −14log(4t−16)
   

But when you check the steps you have:

The answer is:

−14log(−t+4)+constant





I could not understand why the results are different...
Any explanation?

Thank you!

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