Question: Large fraction expansion


I am relatively new to MAPLE. I have a large fraction (actually a Bessel differential equation) which I like to break into single terms, i.e. to cancel the denominator with single summands.

"(diff(g(r),r)*f(phi)*r+r^2*diff(diff(g(r),r),r)*f(phi)+g(r)*diff(diff(f(phi),phi),phi)+h^2*g(r)*f(phi)*r^2)/g(r)/f(phi) = 0"

I tried full partial fraction, but it doesn't accept "g(r)*f(phi)" as variable.

any ideas?

all the best.

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