What is the value of ${\tan }^2\frac{\pi }{24}\cdot {\tan }^2\frac{5\pi }{24}+{\tan }^2\frac{\pi }{24}\cdot {\tan }^2\frac{7\pi }{24}+{\tan }^2\frac{5\pi }{24}\cdot {\tan }^2\frac{11\pi }{24}+{\tan }^2\frac{7\pi }{24}\cdot {\tan }^2\frac{11\pi }{24}$?