C

n=sqrt(1+4.67491+4.077926/(1-0.159328/pow(x,2))+1.896005/(1-900/pow(x,2)))

Python

n=(1+4.67491+4.077926/(1-0.159328/x**2)+1.896005/(1-900/x**2))**.5

Fortran

n=SQRT(1+4.67491+4.077926/(1-0.159328/x**2)+1.896005/(1-900/x**2))

MATLAB

n=sqrt(1+4.67491+4.077926./(1-0.159328./x.^2)+1.896005./(1-900./x.^2))

LaTeX

n^2-1=4.67491+\frac{4.077926λ^2}{λ^2-0.159328}+\frac{1.896005λ^2}{λ^2-900}