Antiderivative: Also known as an indefinite integral, it is essentially "undoing" differentiation. Finding an antiderivative allows us to find any particular solution for which we only know its derivative.
Riemann Sum: An approximation method for calculating definite integrals by dividing an interval into smaller subintervals and summing up areas of rectangles within each subinterval.
Integration Techniques: Various methods such as substitution, integration by parts, or partial fractions used to evaluate integrals when direct application of the fundamental theorem of calculus is not possible.