C

n=sqrt(1+2.1284434/(1-0.0117309815/pow(x,2))+0.405082139/(1-0.0508706599/pow(x,2))+1.67918461/(1-107.091456/pow(x,2)))

Python

n=(1+2.1284434/(1-0.0117309815/x**2)+0.405082139/(1-0.0508706599/x**2)+1.67918461/(1-107.091456/x**2))**.5

Fortran

n=SQRT(1+2.1284434/(1-0.0117309815/x**2)+0.405082139/(1-0.0508706599/x**2)+1.67918461/(1-107.091456/x**2))

MATLAB

n=sqrt(1+2.1284434./(1-0.0117309815./x.^2)+0.405082139./(1-0.0508706599./x.^2)+1.67918461./(1-107.091456./x.^2))

LaTeX

n^2-1=\frac{2.1284434λ^2}{λ^2-0.0117309815}+\frac{0.405082139λ^2}{λ^2-0.0508706599}+\frac{1.67918461λ^2}{λ^2-107.091456}