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Key formulas of the indefinite integral and a trainer to practice them.
An antiderivative F(x) is a function whose derivative equals f(x): F'(x)=f(x).
∫xⁿ dx = xⁿ⁺¹/(n+1) + C. For example: ∫x² dx = x³/3 + C.
C is an arbitrary constant added when finding an antiderivative, because the derivative of a constant equals 0.