Symbol | Meaning |

$\lfloor x\rfloor $ | The integral part of the real number x (also denoted by [x]). |

$\int}_{a}^{\left(b+\right)}{\displaystyle {\int}_{a}^{\left(b-\right)}$ | Contour integrals; the path of integration starting at the point a extends to the point b (along a straight line unless there is an indication to the contrary), encircles the point b along a small circle in the positive (negative) direction, and returns to the point a, proceeding along the original path in the opposite direction. |

$\int}_{C$ | Line integral along ... |

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