C

n=sqrt(1+1.4182/(1-0.021304/pow(x,2)))

Python

n=(1+1.4182/(1-0.021304/x**2))**.5

Fortran

n=SQRT(1+1.4182/(1-0.021304/x**2))

MATLAB

n=sqrt(1+1.4182./(1-0.021304./x.^2))

LaTeX

n^2-1=\frac{1.4182λ^2}{λ^2-0.021304}