diff --git a/stdlib/arith.go b/stdlib/arith.go
index 43e23fb..d516551 100644
--- a/stdlib/arith.go
+++ b/stdlib/arith.go
@@ -56,6 +56,12 @@ func NumCast(in *ast.Token, a ast.VarTable, f ast.FuncTable) *ast.Token {
     return out
 }
 
+/* adds N number arguments
+ * takes N arguments
+ * returns the sum, or nil if improper arguments were given
+ *
+ * Example: (+ 1 2)
+ */
 func Add(in *ast.Token, a ast.VarTable, f ast.FuncTable) *ast.Token {
     var res float64
 
@@ -98,7 +104,12 @@ func Add(in *ast.Token, a ast.VarTable, f ast.FuncTable) *ast.Token {
     return t
 }
 
-func sub(in *ast.Token, a ast.VarTable, f ast.FuncTable) *ast.Token {
+/* subtract N args from the final arg
+ * takes N args, returns nil if improper args given
+ *
+ * Example: (- 2 1)
+ */
+func Sub(in *ast.Token, a ast.VarTable, f ast.FuncTable) *ast.Token {
     var res float64
     var sub float64
 
@@ -148,7 +159,12 @@ func sub(in *ast.Token, a ast.VarTable, f ast.FuncTable) *ast.Token {
     return t
 }
 
-func mult(in *ast.Token, a ast.VarTable, f ast.FuncTable) *ast.Token {
+/* multiplies N arguments
+ * returns nil if an improper argument is given
+ *
+ * Example: (* 1 2)
+ */
+func Mult(in *ast.Token, a ast.VarTable, f ast.FuncTable) *ast.Token {
     res := 1.0
 
     in = in.Eval(f, a, false)
@@ -190,7 +206,13 @@ func mult(in *ast.Token, a ast.VarTable, f ast.FuncTable) *ast.Token {
     return t
 }
 
-func div(in *ast.Token, a ast.VarTable, f ast.FuncTable) *ast.Token {
+/* divide N arguments
+ * the first argument is divided by each subsequent argument in order
+ * returns nil if an improper argument is given
+ *
+ * Example (/ 25 5)
+ */
+func Div(in *ast.Token, a ast.VarTable, f ast.FuncTable) *ast.Token {
     var res float64
 
     in = in.Eval(f, a, false)
diff --git a/stdlib/stdlib.go b/stdlib/stdlib.go
index abed934..9e75e2a 100644
--- a/stdlib/stdlib.go
+++ b/stdlib/stdlib.go
@@ -25,6 +25,9 @@ import (
     "gitlab.com/whom/shs/util"
 )
 
+/* Makes a FuncTable from all functions in the stdlib
+ * add your function here if you are extending the standard library
+ */
 func GenFuncTable() ast.FuncTable {
     var stdlib ast.FuncTable
     stdlib = &map[string]*ast.Function{