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integrate((2*(5 + x^2)*((2 - x)*sin(2*x) + (2 + x)*cos(2*x))) / (2*cos(2*x) - x*sin(2*x))^3, x)
integrate((2*(5 + x^2)*((2 - x)*sin(2*x) + (2 + x)*cos(2*x))) / (2*cos(2*x) - x*sin(2*x))^3, x)
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