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2*alpha)*Power(r,2) + (1 + 4*alpha)*Power(x,2)) + 
             Power(R,2)*((-4 + 3*Power(alpha,3) + Power(alpha,4))*Power(r,2) \
- (2 - 3*Power(alpha,3) + Power(alpha,4))*Power(x,2)))) + 
       Power(beta,4)*Power(x,2)*(2*Power(alpha,3)*Power(r,2)*Power(R,11)*(M + \
(-1 + alpha)*alpha*R) + 2*Power(C,6)*(Power(r,2) - Power(x,2)) + 
          Power(C,4)*Power(R,3)*(-8*M*(Power(r,2) - Power(x,2)) + R*(-((-6 + \
alpha)*Power(r,2)) + (-4 + 3*alpha)*Power(x,2))) + 
          Power(C,2)*Power(R,6)*(5*Power(M,2)*(Power(r,2) - Power(x,2)) + \
M*R*(-7*Power(r,2) + (1 - 2*alpha)*Power(x,2)) + 
             Power(R,2)*(-((-2 + Power(alpha,3) + \
2*Power(alpha,4))*Power(r,2)) + (1 - 3*Power(alpha,3) + \
2*Power(alpha,4))*Power(x,2)))) + 
       Power(beta,2)*Power(R,6)*(-(Power(C,4)*(Power(r,2) - 4*Power(x,2))) + 
          Power(C,2)*Power(R,3)*(M*(Power(r,2) - 13*Power(x,2)) + \
R*(Power(r,2) + 2*alpha*Power(r,2) + Power(x,2) - 2*alpha*Power(x,2))) - 
          Power(R,6)*(Power(M,2)*(Power(r,2) - Power(x,2)) + \
2*M*R*(Power(x,2) + alpha*(Power(r,2) + Power(x,2))) + 
             Power(R,2)*(-2*Power(alpha,3)*Power(r,2) - Power(x,2) + \
Power(alpha,4)*(2*Power(r,2) + Power(x,2)))))))/
   (Power(R,6)*Power(Power(R,6) - 2*beta*C*Power(R,3)*x + \
Power(beta,2)*(Power(r,2)*(2*M - R)*Power(R,3) + Power(C,2)*(-Power(r,2) + \
Power(x,2))),2))\
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