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We can solve the integral $\int y^3\sin\left(4y\right)dy$ by applying integration by parts method to calculate the integral of the product of two functions, using the following formula
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$\displaystyle\int u\cdot dv=u\cdot v-\int v \cdot du$
Learn how to solve integral calculus problems step by step online. Find the integral int(y^3sin(4y))dy. We can solve the integral \int y^3\sin\left(4y\right)dy by applying integration by parts method to calculate the integral of the product of two functions, using the following formula. First, identify u and calculate du. Now, identify dv and calculate v. Solve the integral.