C

n=sqrt(1+1.0093/(1-0.013185/pow(x,2)))

Python

n=(1+1.0093/(1-0.013185/x**2))**.5

Fortran

n=SQRT(1+1.0093/(1-0.013185/x**2))

MATLAB

n=sqrt(1+1.0093./(1-0.013185./x.^2))

LaTeX

n^2-1=\frac{1.0093λ^2}{λ^2-0.013185}