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$\int\left(4r+9r-11r+7r\right)dr$
Learn how to solve integral calculus problems step by step online. Find the integral of 4r+9r-11r7r. Find the integral. Simplify the expression inside the integral. The integral \int13rdr results in: \frac{13}{2}r^2. The integral \int-11rdr results in: -\frac{11}{2}r^2.