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$\int\left(a+7\right)\left(a+5\right)da$
Learn how to solve integral calculus problems step by step online. Integrate the function (a+7)(a+5). Find the integral. Rewrite the integrand \left(a+7\right)\left(a+5\right) in expanded form. Expand the integral \int\left(a^2+12a+35\right)da into 3 integrals using the sum rule for integrals, to then solve each integral separately. The integral \int a^2da results in: \frac{a^{3}}{3}.