1. Trigonometric functions. |

2. Hyperbolic functions. |

3. The natural exponential function. |

4. The natural logarithm. |

5. Exponential and logarithmic functions. |

6. Inverse hyperbolic functions. |

7. Series expansions |

8. The Bernoulli's and Euler's numbers |

9. Cotangents and tangents, cosecants and secants |

10. The ζ (zeta) function |

11. The Euler's Γ, generalized binomial coefficients, Stirling's approximation |