C

n=sqrt(2.1823+0.0125/(pow(x,2)-0.0300))

Python

n=(2.1823+0.0125/(x**2-0.0300))**.5

Fortran

n=SQRT(2.1823+0.0125/(x**2-0.0300))

MATLAB

n=sqrt(2.1823+0.0125./(x.^2-0.0300))

LaTeX

n^2=2.1823+\frac{0.0125}{λ^2-0.0300}