Parentheses in mathematical equations **()** may refer to:

- Precedence of operators
- Interval
- Matrix
- Arguments in mathematical functions. For example,
*f*(*x*) is the function*f*applied to the variable*x*. - A set of coordinates in a coordinate system. For example (4,7) may represent the point located at 4 on the x-axis and 7 on the y-axis.
- More generally, a tuple.
- The greatest common divisor of two numbers
*x*and*y*, sometimes written with the notation (*x*,*y*). - An inner product
- Equivalence class congruence, especially for modular arithmetic or modulo an ideal, e.g. as or .
- A higher order derivative in Lagrange's notation.
- A Binomial coefficient or multinomial coefficient.
- A Legendre symbol, Jacobi symbol or Pochhammer symbol.