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$\int\left(20x^2+2x\right)dx$
Learn how to solve integral calculus problems step by step online. Find the integral int(4*5x^2+2x)dx. Simplifying. Expand the integral \int\left(20x^2+2x\right)dx into 2 integrals using the sum rule for integrals, to then solve each integral separately. The integral \int20x^2dx results in: \frac{20}{3}x^{3}. The integral \int2xdx results in: x^2.