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$\int\left(m+n\right)^2dn$
Learn how to solve differential calculus problems step by step online. Integrate the function (m+n)^2. Find the integral. Rewrite the integrand \left(m+n\right)^2 in expanded form. Expand the integral \int\left(m^{2}+2mn+n^{2}\right)dn into 3 integrals using the sum rule for integrals, to then solve each integral separately. The integral \int m^{2}dn results in: \frac{m^{3}}{3}.