\oiiint
The \oiiint command in LaTeX is used to represent a triple integral over a three-dimensional region. It is often used in calculus and physics to denote the integration of a function over a volume in three-dimensional space.
Triple integral of a function f over a volume V.
\oiiint_V f(x, y, z) \, dx \, dy \, dz
Triple integral over a spherical region, often used in physics for mass or charge distributions.
\oiiint_{\text{sphere}} \rho \, dV
Triple integral over a cubic region, integrating a polynomial function.
\oiiint_{\text{cube}} (x^2 + y^2 + z^2) \, dx \, dy \, dz