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  1. a=float(input())
  2. b=float(input())
  3. c=float(input())
  4. print(abs(a+2*c)/(b*b+3*a*c)*a*(3+(4-a*a)))
Success #stdin #stdout 0.09s 14176KB
stdin
4
5
1
stdout
-5.837837837837839