C

n=sqrt(1+0.809407286/(1-0.00376072389/pow(x,2))+0.527007033/(1-0.0135654895/pow(x,2))+0.909127704/(1-142.503612/pow(x,2)))

Python

n=(1+0.809407286/(1-0.00376072389/x**2)+0.527007033/(1-0.0135654895/x**2)+0.909127704/(1-142.503612/x**2))**.5

Fortran

n=SQRT(1+0.809407286/(1-0.00376072389/x**2)+0.527007033/(1-0.0135654895/x**2)+0.909127704/(1-142.503612/x**2))

MATLAB

n=sqrt(1+0.809407286./(1-0.00376072389./x.^2)+0.527007033./(1-0.0135654895./x.^2)+0.909127704./(1-142.503612./x.^2))

LaTeX

n^2-1=\frac{0.809407286λ^2}{λ^2-0.00376072389}+\frac{0.527007033λ^2}{λ^2-0.0135654895}+\frac{0.909127704λ^2}{λ^2-142.503612}