C

n=sqrt(1+0.98901/(1-0.01023416369/pow(x,2))+0.01121/(1-0.03623317709/pow(x,2)))

Python

n=(1+0.98901/(1-0.01023416369/x**2)+0.01121/(1-0.03623317709/x**2))**.5

Fortran

n=SQRT(1+0.98901/(1-0.01023416369/x**2)+0.01121/(1-0.03623317709/x**2))

MATLAB

n=sqrt(1+0.98901./(1-0.01023416369./x.^2)+0.01121./(1-0.03623317709./x.^2))

LaTeX

n^2-1=\frac{0.98901λ^2}{λ^2-0.01023416369}+\frac{0.01121λ^2}{λ^2-0.03623317709}