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$\int2\left(3x+7\right)dx$
Learn how to solve integral calculus problems step by step online. Factor the expression 2(3x+7). Find the integral. The integral of a function times a constant (2) is equal to the constant times the integral of the function. Expand the integral \int\left(3x+7\right)dx into 2 integrals using the sum rule for integrals, to then solve each integral separately. The integral 2\int3xdx results in: 3x^2.