C

n=sqrt(1+1.6582834/(1-0.0113872516/pow(x,2))+0.263275666/(1-0.0522108137/pow(x,2))+2.10142759/(1-165.523649/pow(x,2)))

Python

n=(1+1.6582834/(1-0.0113872516/x**2)+0.263275666/(1-0.0522108137/x**2)+2.10142759/(1-165.523649/x**2))**.5

Fortran

n=SQRT(1+1.6582834/(1-0.0113872516/x**2)+0.263275666/(1-0.0522108137/x**2)+2.10142759/(1-165.523649/x**2))

MATLAB

n=sqrt(1+1.6582834./(1-0.0113872516./x.^2)+0.263275666./(1-0.0522108137./x.^2)+2.10142759./(1-165.523649./x.^2))

LaTeX

n^2-1=\frac{1.6582834λ^2}{λ^2-0.0113872516}+\frac{0.263275666λ^2}{λ^2-0.0522108137}+\frac{2.10142759λ^2}{λ^2-165.523649}