starting to build this

crates/nu-command/src/lib.rs

@@ -8,6 +8,7 @@ mod filesystem;
 mod filters;
 mod formats;
 mod strings;
+mod math;
 mod system;
 mod viewers;
 
@@ -21,5 +22,6 @@ pub use filesystem::*;
 pub use filters::*;
 pub use formats::*;
 pub use strings::*;
+pub use math::*;
 pub use system::*;
 pub use viewers::*;