diff --git a/cool_oneliners/dict.nu b/cool_oneliners/dict.nu
index d890e84..3678ffd 100644
--- a/cool_oneliners/dict.nu
+++ b/cool_oneliners/dict.nu
@@ -1,16 +1,13 @@
-#As the name suggests, the function returns you the definition and example of the sought English word 
-#(or breaks if it can't find the word because the API uses different columns for successful and invalid searches)
-
-#usage: dict word
-#usage: dict "word with space"
-
-def dict [word: string] {
-  let link = (build-string 'https://api.dictionaryapi.dev/api/v2/entries/en/' ($word|str find-replace ' ' '%20'))
+# Function querying free online English dictionary API for definition of given word(s)
+def dict [...word #word(s) to query the dictionary API but they have to make sense together like "martial law", not "cats dogs"
+] {
+	let query = ($word | str collect %20)
+  let link = (build-string 'https://api.dictionaryapi.dev/api/v2/entries/en/' ($query|str find-replace ' ' '%20'))
   let output = (fetch $link |
   rename word)
-  let w = ($output.word | first)  
+  let w = ($output.word | first)
 
-  if $w == "No Definitions Found" {echo $output.word} {echo $output | 
+  if $w == "No Definitions Found" {echo $output.word} {echo $output |
   get meanings.definitions |
   select definition example
   }
diff --git a/data_extraction/ultimate_extractor.nu b/data_extraction/ultimate_extractor.nu
index e7f5312..d7383e2 100644
--- a/data_extraction/ultimate_extractor.nu
+++ b/data_extraction/ultimate_extractor.nu
@@ -1,25 +1,23 @@
-#As in the file name, the script is designed to conveniently handle any archive format
-
-#usage: extract archive_name
-
-def extract [name:string] {
+#Function to extract archives with different extensions
+def extract [name:string #name of the archive to extract
+] {
   let exten = [ [ex com];
-                ['.tar.bz2' 'tar xjf']
-                ['.tar.gz' 'tar xzf']
-                ['.bz2' 'bunzip2']
-                ['.rar' 'unrar x']
-                ['.tbz2' 'tar xjf']
-                ['.tgz' 'tar xzf']
-                ['.zip' 'unzip']
-                ['.7z' '/usr/bin/7z x']
-                ['.deb' 'ar x']
-                ['.tar.xz' 'tar xvf']
-                ['.tar.zst' 'tar xvf']
-                ['.tar' 'tar xvf']
-                ['.gz' 'gunzip']
-                ['.Z' 'uncompress']
-                ]
-  
+                    ['.tar.bz2' 'tar xjf']
+                    ['.tar.gz' 'tar xzf']
+                    ['.bz2' 'bunzip2']
+                    ['.rar' 'unrar x']
+                    ['.tbz2' 'tar xjf']
+                    ['.tgz' 'tar xzf']
+                    ['.zip' 'unzip']
+                    ['.7z' '/usr/bin/7z x']
+                    ['.deb' 'ar x']
+                    ['.tar.xz' 'tar xvf']
+                    ['.tar.zst' 'tar xvf']
+                    ['.tar' 'tar xvf']
+                    ['.gz' 'gunzip']
+                    ['.Z' 'uncompress']
+                    ]
+
   let command = ($exten|where $name =~ $it.ex|first)
   if ($command|empty?) {
     echo 'Error! Unsupported file extension'
diff --git a/maths/math_functions.nu b/maths/math_functions.nu
index de3434e..9249f82 100644
--- a/maths/math_functions.nu
+++ b/maths/math_functions.nu
@@ -1,37 +1,33 @@
 #!/usr/bin/nu
-# made by @skelly37 for everyone :)
-#
-# (sqrt skipped because of math module from nushell)
 #
 # BE CAREFUL WITH ROOTS MADE ON BIG NUMBERS (10 digits and more) — the result is rounded so you may get wrong result.
 # just modify the round -p or calculate it manually
 
-# cube root
+#Root with a custom denominator
+def root [ denominator: number, num: number ] {
+	$num ** ( 1 / $denominator ) | math round  -p 10
+}
+
+#Cube root
 def croot [num: number] {
 	$num ** ( 1 / 3 ) | math round -p 10
 }
 
-# root with custom denominator, e.g. 2 ** 1/4
-def root [ denominator: number, num: number ] {
-	$num ** ( 1 / $denominator ) | math round -p 10
-}
-
-# totally custom root, e.g. 2 ** 3/8
+#Root with a custom scaler and denominator
 def aroot [ scaler: number, denominator: number, num: number ] {
 	$num ** ($scaler / $denominator) | math round -p 10
 }
 
-#discriminant of a quadratic equation
-def delta [ a: number, b: number, c: number ] {
+#calculate delta of the quadratic function
+def delta [ a: number,#x^2 factor
+b: number, #x factor
+c: number #the rest
+] {
 	( $b ** 2 ) - ( 4 * $a * $c)
 }
 
-#factorial of a given number, works fine only for n<21 (integer range)
-def fact [num:number] {
+#Factorial of the given number
+def fact [num: int] {
 	if $num >= 0 { if $num < 2 {$num} {seq 2 $num | math product} } { echo 'Error: can only calculate non-negative integers'}
 }
 
-#TODO:
-# -sin, cos, tan table for 0-90 degrees
-# -radians to degrees and reversed
-# -sin, cos, tan, ctg, sec, cosec functions