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$\int\left(1+2n+n^2\right)dn$
Learn how to solve integral calculus problems step by step online. Find the integral of 1+2nn^2. Find the integral. Expand the integral \int\left(1+2n+n^2\right)dn into 3 integrals using the sum rule for integrals, to then solve each integral separately. The integral \int1dn results in: n. The integral \int2ndn results in: n^2.