C

n=sqrt(1+3.52555/(1-pow(0.17950/x,2))+0.20660/(1-pow(0.32537/x,2)))

Python

n=(1+3.52555/(1-(0.17950/x)**2)+0.20660/(1-(0.32537/x)**2))**.5

Fortran

n=SQRT(1+3.52555/(1-(0.17950/x)**2)+0.20660/(1-(0.32537/x)**2))

MATLAB

n=sqrt(1+3.52555./(1-(0.17950./x).^2)+0.20660./(1-(0.32537./x).^2))

LaTeX

n^2-1=\frac{3.52555λ^2}{λ^2-0.17950^2}+\frac{0.20660λ^2}{λ^2-0.32537^2}