G. insert '''' I'm stupid: r'$Delta$' ''' inside your code. The checker doesn't see $Delta$ is latex, it isn't going to see r helps prevent escaping anything, and it won't see anyway this is the comment enclosed in '''. Boids by Simon Woods: can we re-invent further more economical flocking https://mpowerdirectory.com/listings712914/luxury-suv-and-sedan-service-in-greenwich-ct-options