C

n=sqrt(1+5.3635/(1-0.050267/pow(x,2)))

Python

n=(1+5.3635/(1-0.050267/x**2))**.5

Fortran

n=SQRT(1+5.3635/(1-0.050267/x**2))

MATLAB

n=sqrt(1+5.3635./(1-0.050267./x.^2))

LaTeX

n^2-1=\frac{5.3635λ^2}{λ^2-0.050267}