F'(x) = 2/3cos-1/3(3x² + 5x)sin(3x² + 5x)(6x + 5)
F'(x) = 2/3(6x + 5)sin(3x² + 5x)cos2/3(3x² + 5x)
cos(3x² + 5x)
F'(x) = 2/3(6x + 5)tan(3x² + 5x)cos2/3(3x² + 5x)
F'(x) = 2(6x + 5) tan(3x² + 5x)∛cos²(3x² + 5x)
3