C

n=sqrt(2.663434655+0.037318762/(pow(x,2)-pow(0.175493731,2))-0.013296131*pow(x,2))

Python

n=(2.663434655+0.037318762/(x**2-0.175493731**2)-0.013296131*x**2)**.5

Fortran

n=SQRT(2.663434655+0.037318762/(x**2-0.175493731**2)-0.013296131*x**2)

MATLAB

n=sqrt(2.663434655+0.037318762./(x.^2-0.175493731.^2)-0.013296131.*x.^2)

LaTeX

n^2=2.663434655+\frac{0.037318762}{λ^2-0.175493731^{2}}-0.013296131λ^{2}