mathematical functions: fix docu (typos, correct rendering), alphabetical order.
mathematical functions: fix docu (typos, correct rendering), alphabetical order.

aslanbekirov/crate,EvilMcJerkface/crate,puneetjaiswal/crate,gmrodrigues/crate,crate/crate,adrpar/crate,crate/crate,husky-koglhof/crate,gmrodrigues/crate,adrpar/crate,puneetjaiswal/crate,aslanbekirov/crate,sunny256/crate,EvilMcJerkface/crate,crate/crate,husky-koglhof/crate,adrpar/crate,aslanbekirov/crate,gmrodrigues/crate,EvilMcJerkface/crate,sunny256/crate,sunny256/crate,husky-koglhof/crate,puneetjaiswal/crate