C

n=sqrt(7.197+0.3322/(pow(x,2)-0.0843))

Python

n=(7.197+0.3322/(x**2-0.0843))**.5

Fortran

n=SQRT(7.197+0.3322/(x**2-0.0843))

MATLAB

n=sqrt(7.197+0.3322./(x.^2-0.0843))

LaTeX

n^2=7.197+\frac{0.3322}{λ^2-0.0843}