Express $\frac{2}{\sec ^{2} x}+\frac{2}{\csc ^{2} x}$ In Terms Of $\sin x$ And $\cos x$

Express $\frac{2}{\sec ^{2} x}+\frac{2}{\csc ^{2} x}$ in terms of $\sin x$ and $\cos x$ , and simplify.