Integral
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An integral is a mathematical construction used in Calculus to represent the area of a region in a plane. Integrals use the following notation: <math>\int_a^b f(x)dx</math> where a and b represent the lower and upper bounds of the interval being integrated over, f represents the function being integrated (the integrand), and dx represents a dummy variable given various definitions, depending on the context of the integral.
Integration is the inverse function of derivation, and is related to it by the Fundamental Theorem of Calculus.