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$\int\left(a+b\right)\left(a-b\right)db$
Learn how to solve integral calculus problems step by step online. Find the integral of (a+b)(a-b). Find the integral. Rewrite the integrand \left(a+b\right)\left(a-b\right) in expanded form. Expand the integral \int\left(a^2-b^2\right)db into 2 integrals using the sum rule for integrals, to then solve each integral separately. The integral \int a^2db results in: \frac{a^{3}}{3}.