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$\int\left(n-1\right)\left(n+1\right)dn$
Learn how to solve problems step by step online. Integrate the function (n-1)(n+1). Find the integral. We can solve the integral \int\left(n-1\right)\left(n+1\right)dn by applying integration by parts method to calculate the integral of the product of two functions, using the following formula. First, identify u and calculate du. Now, identify dv and calculate v.