This is a symbol for any generic variable. It can hold any value, whether that be an integer or a real number, or a complex number, or a matrix etc.

This is the symbol for an integral, sometimes referred to as an antiderivative. Graphically, it can be understood as the area between a curve and the axis the integral is taken with respect to.

This is a general symbol for the derivative of a general function, \(\htmlClass{sdt-0000000096}{f}(\htmlClass{sdt-0000000003}{x})\), in Legrange's notation.

This symbol represents the constant of integration. It must be added to the result of all definite integrals to encompass all possible solutions that satisfy the integral.

This is the symbol for a function. It is commonly used in algebra, and (multivariate) calculus.

This is the symbol for a differential. It represents an infinitesimally small (infinitely close to zero) change in whatever variable it is with respect to.