<wib_jonas> slashlearn hand injuries//Hand injuries are surprisingly common among webcomic writers, see eg. http://questionablecontent.net/view.php?comic=2314 http://www.giantitp.com/comics/oots0864.html or https://www.irregularwebcomic.net/news.php?date=2020-05-27

Bézout's theorem says that if a system of polynomial equations over the complexes has as many variables as equations, then in the general case the number of solutions it has is equal to the product of one less than the degrees of the polynomials.