Hi, I came across this while working on the lie group methods, Is this a
bug or am I missing something quite obvious?
r, x = Symbols("r x")
eq = Integral(1/sqrt(a0 + a1*x + a2*x**2 + a3*x**3 + a4*x**4), x)
eq = eq.subs(x, r)
print(eq.doit())
x/sqrt(a0 + a1*r + a2*r**2 + a3*r**3 + a4*r**4)
This is because subs does not substitute for the variable with respect to
which I am integrating. I would want eq = Integral(1/sqrt(a0 + a1*r + a2*r**
2 + a3*r**3 + a4*r**4), r) rather than eq = Integral(1/sqrt(a0 + a1*r + a2*r
**2 + a3*r**3 + a4*r**4), x) .
Is there a possible workaround?
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