Error while using DSolve[ ]?

Need help with dsolving this equation ><
I am new to Mathematica and not sure what went wrong with my input.

You do not have to specify

F1[R]=c1 F1[R]+C2 F2[R]

Just use

DSolve[eqn,F1[R],R]

Your definition for eqn already has the ==0

The derivative of a function is not written as F[R]', but as either F'[R] or D[F[R],R].

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Thank you.

Thank you.