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$\int\left(2a-1\right)\left(2a+1\right)da$
Learn how to solve integral calculus problems step by step online. Find the integral of (2a-1)(2a+1). Find the integral. Rewrite the integrand \left(2a-1\right)\left(2a+1\right) in expanded form. Expand the integral \int\left(4a^2-1\right)da into 2 integrals using the sum rule for integrals, to then solve each integral separately. The integral \int4a^2da results in: \frac{4}{3}a^{3}.