C

n=1.37239718-3.99406e-3*pow(x,-1)+4.46458e-3*pow(x,-2)

Python

n=1.37239718-3.99406e-3*x**-1+4.46458e-3*x**-2

Fortran

n=1.37239718-3.99406e-3*x**-1+4.46458e-3*x**-2

MATLAB

n=1.37239718-3.99406e-3.*x.^-1+4.46458e-3.*x.^-2

LaTeX

n=1.37239718-3.99406\text{×}10^{-3}λ^{-1}+4.46458\text{×}10^{-3}λ^{-2}