Average Error: 53.1 → 53.0
Time: 20.1s
Precision: 64
Internal Precision: 128
\[\frac{2}{e^{x} + e^{-x}}\]
\[\left(\left(\sqrt[3]{{x}^{4} \cdot \frac{1}{9}} \cdot \left(\sqrt[3]{{x}^{4} \cdot \frac{1}{9}} \cdot \sqrt[3]{{x}^{4} \cdot \frac{1}{9}}\right) + 1\right) - {x}^{2} \cdot \frac{1}{3}\right) \cdot \sqrt[3]{\left(1 + \frac{5}{24} \cdot {x}^{4}\right) - \frac{1}{2} \cdot {x}^{2}}\]

Error

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Derivation

  1. Initial program 53.1

    \[\frac{2}{e^{x} + e^{-x}}\]
  2. Initial simplification53.1

    \[\leadsto \frac{2}{e^{x} + e^{-x}}\]
  3. Taylor expanded around 0 53.0

    \[\leadsto \color{blue}{\left(\frac{5}{24} \cdot {x}^{4} + 1\right) - \frac{1}{2} \cdot {x}^{2}}\]
  4. Using strategy rm
  5. Applied add-cube-cbrt53.0

    \[\leadsto \color{blue}{\left(\sqrt[3]{\left(\frac{5}{24} \cdot {x}^{4} + 1\right) - \frac{1}{2} \cdot {x}^{2}} \cdot \sqrt[3]{\left(\frac{5}{24} \cdot {x}^{4} + 1\right) - \frac{1}{2} \cdot {x}^{2}}\right) \cdot \sqrt[3]{\left(\frac{5}{24} \cdot {x}^{4} + 1\right) - \frac{1}{2} \cdot {x}^{2}}}\]
  6. Taylor expanded around 0 53.0

    \[\leadsto \color{blue}{\left(\left(\frac{1}{9} \cdot {x}^{4} + 1\right) - \frac{1}{3} \cdot {x}^{2}\right)} \cdot \sqrt[3]{\left(\frac{5}{24} \cdot {x}^{4} + 1\right) - \frac{1}{2} \cdot {x}^{2}}\]
  7. Using strategy rm
  8. Applied add-cube-cbrt53.0

    \[\leadsto \left(\left(\color{blue}{\left(\sqrt[3]{\frac{1}{9} \cdot {x}^{4}} \cdot \sqrt[3]{\frac{1}{9} \cdot {x}^{4}}\right) \cdot \sqrt[3]{\frac{1}{9} \cdot {x}^{4}}} + 1\right) - \frac{1}{3} \cdot {x}^{2}\right) \cdot \sqrt[3]{\left(\frac{5}{24} \cdot {x}^{4} + 1\right) - \frac{1}{2} \cdot {x}^{2}}\]
  9. Final simplification53.0

    \[\leadsto \left(\left(\sqrt[3]{{x}^{4} \cdot \frac{1}{9}} \cdot \left(\sqrt[3]{{x}^{4} \cdot \frac{1}{9}} \cdot \sqrt[3]{{x}^{4} \cdot \frac{1}{9}}\right) + 1\right) - {x}^{2} \cdot \frac{1}{3}\right) \cdot \sqrt[3]{\left(1 + \frac{5}{24} \cdot {x}^{4}\right) - \frac{1}{2} \cdot {x}^{2}}\]

Runtime

Time bar (total: 20.1s)Debug logProfile

herbie shell --seed 2018255 
(FPCore (x)
  :name "Hyperbolic secant"
  (/ 2 (+ (exp x) (exp (- x)))))