Is there supposed to be a “+ …” in here? If so, may I open a PR and count it as my first open-source contribution 
?
Hi @Kamal_Mohamed, I think you’re right! In fact we’re missing a factorial next to the ‘4’ and a “± …” or something similar where you have the arrow. Please go ahead and open a PR in the Codebook’s repository. It’s exciting that you’ll be making your first open-source contribution! 
Awesome! I opened the PR.
Thank you for pointing out the factorial. I think the term to the power of 6 should have a – sign in the front, so I made it a minus sign based on that.
Awesome! Thank you for making the PR.