>
> Keep in mind that indefinite integrals are only defined up to a 
> constant.
>
 
My math teacher just reminded me to definitely not disagree on that ;)

Let me pls. follow up in a different way. We can do

a,b = sp.symbols('a b')

r1=u.subs({x:a,y:sp.Integer(2),G:sp.Integer(1)}) - 
u.subs({x:b,y:sp.Integer(2),G:sp.Integer(1)})

r2=v.subs({x:a})-v.subs({x:b})


With u and v defined as in my original post.

Mathematically r1 and r2 are the same.

Do you know what kind of simplification I would have to apply to either of 
the two expressions r1,r2, to make SymPy actually also tell me that?

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