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$\int\left(3x\left(x-3\right)-4x\right)dx$
Learn how to solve integral calculus problems step by step online. Find the integral of x(x+-7)=3x(x-3)-4x. Find the integral. Rewrite the expression 3x\left(x-3\right)-4x inside the integral in factored form. Solve the product x\left(-13+3x\right). Expand the integral \int\left(-13x+3x^2\right)dx into 2 integrals using the sum rule for integrals, to then solve each integral separately.