Hello World
\(P=\dfrac{A}{B}\left[\left(\dfrac{\lambda_1}{\lambda_0}\right)^B-1\right]\), \(A=1920\), \(B=9.61\);
\(T\le80\): \(\lambda_1=\lambda+0.92\);
\(80<T<298\): \(\lambda_1=\lambda+0.92\), \(\Delta T=T-298\), \(\lambda_1=\lambda+0.00003547-\Delta T\times0.0068259498-\Delta T^2\times0.0000046231-\Delta T^3\times0.0000000337\)