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The integral of a function times a constant ($7$) is equal to the constant times the integral of the function
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$7\int x\left(2x+3\right)dx$
Learn how to solve integral calculus problems step by step online. Find the integral int(7x(2x+3))dx. The integral of a function times a constant (7) is equal to the constant times the integral of the function. We can solve the integral \int x\left(2x+3\right)dx 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.