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$\int\left(x^4-81\right)dx$
Learn how to solve integral calculus problems step by step online. Find the integral of x^4-81. Find the integral. Expand the integral \int\left(x^4-81\right)dx into 2 integrals using the sum rule for integrals, to then solve each integral separately. The integral \int x^4dx results in: \frac{x^{5}}{5}. The integral \int-81dx results in: -81x.